Finding the Fourth Proportional to 10,440.72, 15,663.20 and 3,515.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,440.72 : 15,663.20 = 3,515.04 : x
2. Step 2: Convert to fraction form
   10,440.72/15,663.20 = 3,515.04/x
3. Step 3: Cross multiply
   10,440.72x = 15,663.20 × 3,515.04
4. Step 4: Simplify right side
   10,440.72x = 55,056,774.53
5. Step 5: Solve for x
   x = 55,056,774.53/10,440.72
6. Step 6: Final answer
   x = 5,273.27