Finding the Fourth Proportional to 9,520.72, 13,138.72 and 5,330.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,520.72 : 13,138.72 = 5,330.32 : x
2. Step 2: Convert to fraction form
   9,520.72/13,138.72 = 5,330.32/x
3. Step 3: Cross multiply
   9,520.72x = 13,138.72 × 5,330.32
4. Step 4: Simplify right side
   9,520.72x = 70,033,581.99
5. Step 5: Solve for x
   x = 70,033,581.99/9,520.72
6. Step 6: Final answer
   x = 7,355.91