Finding the Fourth Proportional to 25,239.15, 34,819.88 and 15,168.15

Step by Step Solution

1. Step 1: Write the proportion equation
   25,239.15 : 34,819.88 = 15,168.15 : x
2. Step 2: Convert to fraction form
   25,239.15/34,819.88 = 15,168.15/x
3. Step 3: Cross multiply
   25,239.15x = 34,819.88 × 15,168.15
4. Step 4: Simplify right side
   25,239.15x = 528,153,086.98
5. Step 5: Solve for x
   x = 528,153,086.98/25,239.15
6. Step 6: Final answer
   x = 20,925.95