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Finding the Fourth Proportional to 266,088,158.61, 399,133,218.42 and 81,854,358.45

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Solution

The fourth proportional to 266,088,158.61, 399,133,218.42 and 81,854,358.45 is: 122,781,839.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,088,158.61 : 399,133,218.42 = 81,854,358.45 : x
  2. Step 2: Convert to fraction form
    266,088,158.61/399,133,218.42 = 81,854,358.45/x
  3. Step 3: Cross multiply
    266,088,158.61x = 399,133,218.42 × 81,854,358.45
  4. Step 4: Simplify right side
    266,088,158.61x = 32,670,793,529,852,824
  5. Step 5: Solve for x
    x = 32,670,793,529,852,824/266,088,158.61
  6. Step 6: Final answer
    x = 122,781,839.30

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