Finding the Fourth Proportional to 25,715.54, 35,487.72 and 15,105.35

Step by Step Solution

1. Step 1: Write the proportion equation
   25,715.54 : 35,487.72 = 15,105.35 : x
2. Step 2: Convert to fraction form
   25,715.54/35,487.72 = 15,105.35/x
3. Step 3: Cross multiply
   25,715.54x = 35,487.72 × 15,105.35
4. Step 4: Simplify right side
   25,715.54x = 536,054,520.02
5. Step 5: Solve for x
   x = 536,054,520.02/25,715.54
6. Step 6: Final answer
   x = 20,845.55