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Finding the Fourth Proportional to 207,910.80, 311,428.80 and 172,918.80

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Solution

The fourth proportional to 207,910.80, 311,428.80 and 172,918.80 is: 259,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,910.80 : 311,428.80 = 172,918.80 : x
  2. Step 2: Convert to fraction form
    207,910.80/311,428.80 = 172,918.80/x
  3. Step 3: Cross multiply
    207,910.80x = 311,428.80 × 172,918.80
  4. Step 4: Simplify right side
    207,910.80x = 53,851,894,381.44
  5. Step 5: Solve for x
    x = 53,851,894,381.44/207,910.80
  6. Step 6: Final answer
    x = 259,014.42

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