Finding the Fourth Proportional to 10,981.20, 15,155.72 and 7,003.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.20 : 15,155.72 = 7,003.92 : x
2. Step 2: Convert to fraction form
   10,981.20/15,155.72 = 7,003.92/x
3. Step 3: Cross multiply
   10,981.20x = 15,155.72 × 7,003.92
4. Step 4: Simplify right side
   10,981.20x = 106,149,450.42
5. Step 5: Solve for x
   x = 106,149,450.42/10,981.20
6. Step 6: Final answer
   x = 9,666.47