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Finding the Fourth Proportional to 12,886.16, 19,327.40 and 4,119.92

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Solution

The fourth proportional to 12,886.16, 19,327.40 and 4,119.92 is: 6,179.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.16 : 19,327.40 = 4,119.92 : x
  2. Step 2: Convert to fraction form
    12,886.16/19,327.40 = 4,119.92/x
  3. Step 3: Cross multiply
    12,886.16x = 19,327.40 × 4,119.92
  4. Step 4: Simplify right side
    12,886.16x = 79,627,341.81
  5. Step 5: Solve for x
    x = 79,627,341.81/12,886.16
  6. Step 6: Final answer
    x = 6,179.29

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