Finding the Fourth Proportional to 25,522.50, 35,211.72 and 15,447.28

Step by Step Solution

1. Step 1: Write the proportion equation
   25,522.50 : 35,211.72 = 15,447.28 : x
2. Step 2: Convert to fraction form
   25,522.50/35,211.72 = 15,447.28/x
3. Step 3: Cross multiply
   25,522.50x = 35,211.72 × 15,447.28
4. Step 4: Simplify right side
   25,522.50x = 543,925,298.12
5. Step 5: Solve for x
   x = 543,925,298.12/25,522.50
6. Step 6: Final answer
   x = 21,311.60