Finding the Fourth Proportional to 9,159.80, 12,635.12 and 5,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.80 : 12,635.12 = 5,620.50 : x
2. Step 2: Convert to fraction form
   9,159.80/12,635.12 = 5,620.50/x
3. Step 3: Cross multiply
   9,159.80x = 12,635.12 × 5,620.50
4. Step 4: Simplify right side
   9,159.80x = 71,015,706.01
5. Step 5: Solve for x
   x = 71,015,706.01/9,159.80
6. Step 6: Final answer
   x = 7,752.98