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Finding the Fourth Proportional to 426,978.61, 640,578.87 and 127,459.24

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Solution

The fourth proportional to 426,978.61, 640,578.87 and 127,459.24 is: 191,221.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,978.61 : 640,578.87 = 127,459.24 : x
  2. Step 2: Convert to fraction form
    426,978.61/640,578.87 = 127,459.24/x
  3. Step 3: Cross multiply
    426,978.61x = 640,578.87 × 127,459.24
  4. Step 4: Simplify right side
    426,978.61x = 81,647,694,328.81
  5. Step 5: Solve for x
    x = 81,647,694,328.81/426,978.61
  6. Step 6: Final answer
    x = 191,221.98

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