Finding the Fourth Proportional to 11,200.43, 15,453.80 and 7,216.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,200.43 : 15,453.80 = 7,216.75 : x
2. Step 2: Convert to fraction form
   11,200.43/15,453.80 = 7,216.75/x
3. Step 3: Cross multiply
   11,200.43x = 15,453.80 × 7,216.75
4. Step 4: Simplify right side
   11,200.43x = 111,526,211.15
5. Step 5: Solve for x
   x = 111,526,211.15/11,200.43
6. Step 6: Final answer
   x = 9,957.32