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Finding the Fourth Proportional to 7,857.92, 11,788.19 and 3,645.39

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Solution

The fourth proportional to 7,857.92, 11,788.19 and 3,645.39 is: 5,468.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.92 : 11,788.19 = 3,645.39 : x
  2. Step 2: Convert to fraction form
    7,857.92/11,788.19 = 3,645.39/x
  3. Step 3: Cross multiply
    7,857.92x = 11,788.19 × 3,645.39
  4. Step 4: Simplify right side
    7,857.92x = 42,972,531.72
  5. Step 5: Solve for x
    x = 42,972,531.72/7,857.92
  6. Step 6: Final answer
    x = 5,468.69

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