Finding the Fourth Proportional to 42,086.08, 63,165.90 and 17,139.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.08 : 63,165.90 = 17,139.76 : x
2. Step 2: Convert to fraction form
   42,086.08/63,165.90 = 17,139.76/x
3. Step 3: Cross multiply
   42,086.08x = 63,165.90 × 17,139.76
4. Step 4: Simplify right side
   42,086.08x = 1,082,648,366.18
5. Step 5: Solve for x
   x = 1,082,648,366.18/42,086.08
6. Step 6: Final answer
   x = 25,724.62