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Finding the Fourth Proportional to 7,408.80, 11,090.52 and 6,929.28

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Solution

The fourth proportional to 7,408.80, 11,090.52 and 6,929.28 is: 10,372.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,408.80 : 11,090.52 = 6,929.28 : x
  2. Step 2: Convert to fraction form
    7,408.80/11,090.52 = 6,929.28/x
  3. Step 3: Cross multiply
    7,408.80x = 11,090.52 × 6,929.28
  4. Step 4: Simplify right side
    7,408.80x = 76,849,318.43
  5. Step 5: Solve for x
    x = 76,849,318.43/7,408.80
  6. Step 6: Final answer
    x = 10,372.71

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