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Finding the Fourth Proportional to 12,867.50, 17,757.70 and 7,278.50

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Solution

The fourth proportional to 12,867.50, 17,757.70 and 7,278.50 is: 10,044.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,867.50 : 17,757.70 = 7,278.50 : x
  2. Step 2: Convert to fraction form
    12,867.50/17,757.70 = 7,278.50/x
  3. Step 3: Cross multiply
    12,867.50x = 17,757.70 × 7,278.50
  4. Step 4: Simplify right side
    12,867.50x = 129,249,419.45
  5. Step 5: Solve for x
    x = 129,249,419.45/12,867.50
  6. Step 6: Final answer
    x = 10,044.64

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