Finding the Fourth Proportional to 9,902.52, 13,662.50 and 8,656.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.52 : 13,662.50 = 8,656.20 : x
2. Step 2: Convert to fraction form
   9,902.52/13,662.50 = 8,656.20/x
3. Step 3: Cross multiply
   9,902.52x = 13,662.50 × 8,656.20
4. Step 4: Simplify right side
   9,902.52x = 118,265,332.50
5. Step 5: Solve for x
   x = 118,265,332.50/9,902.52
6. Step 6: Final answer
   x = 11,942.95