Finding the Fourth Proportional to 25,139.86, 34,694.86 and 15,581.62

Step by Step Solution

1. Step 1: Write the proportion equation
   25,139.86 : 34,694.86 = 15,581.62 : x
2. Step 2: Convert to fraction form
   25,139.86/34,694.86 = 15,581.62/x
3. Step 3: Cross multiply
   25,139.86x = 34,694.86 × 15,581.62
4. Step 4: Simplify right side
   25,139.86x = 540,602,124.47
5. Step 5: Solve for x
   x = 540,602,124.47/25,139.86
6. Step 6: Final answer
   x = 21,503.78