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Finding the Fourth Proportional to 13,158.95, 19,742.09 and 7,319.66

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Solution

The fourth proportional to 13,158.95, 19,742.09 and 7,319.66 is: 10,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.95 : 19,742.09 = 7,319.66 : x
  2. Step 2: Convert to fraction form
    13,158.95/19,742.09 = 7,319.66/x
  3. Step 3: Cross multiply
    13,158.95x = 19,742.09 × 7,319.66
  4. Step 4: Simplify right side
    13,158.95x = 144,505,251.18
  5. Step 5: Solve for x
    x = 144,505,251.18/13,158.95
  6. Step 6: Final answer
    x = 10,981.52

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