Finding the Fourth Proportional to 17,139.70, 25,711.55 and 5,454.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.70 : 25,711.55 = 5,454.10 : x
2. Step 2: Convert to fraction form
   17,139.70/25,711.55 = 5,454.10/x
3. Step 3: Cross multiply
   17,139.70x = 25,711.55 × 5,454.10
4. Step 4: Simplify right side
   17,139.70x = 140,233,364.86
5. Step 5: Solve for x
   x = 140,233,364.86/17,139.70
6. Step 6: Final answer
   x = 8,181.79