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Finding the Fourth Proportional to 18,928.18, 28,402.52 and 7,090.02

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Solution

The fourth proportional to 18,928.18, 28,402.52 and 7,090.02 is: 10,638.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.18 : 28,402.52 = 7,090.02 : x
  2. Step 2: Convert to fraction form
    18,928.18/28,402.52 = 7,090.02/x
  3. Step 3: Cross multiply
    18,928.18x = 28,402.52 × 7,090.02
  4. Step 4: Simplify right side
    18,928.18x = 201,374,419.28
  5. Step 5: Solve for x
    x = 201,374,419.28/18,928.18
  6. Step 6: Final answer
    x = 10,638.87

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