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Finding the Fourth Proportional to 89,128.98, 133,693.47 and 21,660.66

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Solution

The fourth proportional to 89,128.98, 133,693.47 and 21,660.66 is: 32,490.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,128.98 : 133,693.47 = 21,660.66 : x
  2. Step 2: Convert to fraction form
    89,128.98/133,693.47 = 21,660.66/x
  3. Step 3: Cross multiply
    89,128.98x = 133,693.47 × 21,660.66
  4. Step 4: Simplify right side
    89,128.98x = 2,895,888,797.89
  5. Step 5: Solve for x
    x = 2,895,888,797.89/89,128.98
  6. Step 6: Final answer
    x = 32,490.99

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