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Finding the Fourth Proportional to 438,257.88, 657,388.71 and 138,739.91

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Solution

The fourth proportional to 438,257.88, 657,388.71 and 138,739.91 is: 208,110.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,257.88 : 657,388.71 = 138,739.91 : x
  2. Step 2: Convert to fraction form
    438,257.88/657,388.71 = 138,739.91/x
  3. Step 3: Cross multiply
    438,257.88x = 657,388.71 × 138,739.91
  4. Step 4: Simplify right side
    438,257.88x = 91,206,047,173.47
  5. Step 5: Solve for x
    x = 91,206,047,173.47/438,257.88
  6. Step 6: Final answer
    x = 208,110.46

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