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Finding the Fourth Proportional to 438,420.96, 657,650.58 and 138,923.61

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Solution

The fourth proportional to 438,420.96, 657,650.58 and 138,923.61 is: 208,391.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,420.96 : 657,650.58 = 138,923.61 : x
  2. Step 2: Convert to fraction form
    438,420.96/657,650.58 = 138,923.61/x
  3. Step 3: Cross multiply
    438,420.96x = 657,650.58 × 138,923.61
  4. Step 4: Simplify right side
    438,420.96x = 91,363,192,692.19
  5. Step 5: Solve for x
    x = 91,363,192,692.19/438,420.96
  6. Step 6: Final answer
    x = 208,391.48

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