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Finding the Fourth Proportional to 13,619.29, 20,418.55 and 7,041.28

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Solution

The fourth proportional to 13,619.29, 20,418.55 and 7,041.28 is: 10,556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.29 : 20,418.55 = 7,041.28 : x
  2. Step 2: Convert to fraction form
    13,619.29/20,418.55 = 7,041.28/x
  3. Step 3: Cross multiply
    13,619.29x = 20,418.55 × 7,041.28
  4. Step 4: Simplify right side
    13,619.29x = 143,772,727.74
  5. Step 5: Solve for x
    x = 143,772,727.74/13,619.29
  6. Step 6: Final answer
    x = 10,556.55

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