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Finding the Fourth Proportional to 512,978.79, 769,468.23 and 139,001.79

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Solution

The fourth proportional to 512,978.79, 769,468.23 and 139,001.79 is: 208,502.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,978.79 : 769,468.23 = 139,001.79 : x
  2. Step 2: Convert to fraction form
    512,978.79/769,468.23 = 139,001.79/x
  3. Step 3: Cross multiply
    512,978.79x = 769,468.23 × 139,001.79
  4. Step 4: Simplify right side
    512,978.79x = 106,957,461,318.13
  5. Step 5: Solve for x
    x = 106,957,461,318.13/512,978.79
  6. Step 6: Final answer
    x = 208,502.70

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