Finding the Fourth Proportional to 10,404.80, 15,589.92 and 7,320.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,404.80 : 15,589.92 = 7,320.32 : x
2. Step 2: Convert to fraction form
   10,404.80/15,589.92 = 7,320.32/x
3. Step 3: Cross multiply
   10,404.80x = 15,589.92 × 7,320.32
4. Step 4: Simplify right side
   10,404.80x = 114,123,203.17
5. Step 5: Solve for x
   x = 114,123,203.17/10,404.80
6. Step 6: Final answer
   x = 10,968.32