Finding the Fourth Proportional to 10,439.29, 15,660.56 and 3,513.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.29 : 15,660.56 = 3,513.25 : x
2. Step 2: Convert to fraction form
   10,439.29/15,660.56 = 3,513.25/x
3. Step 3: Cross multiply
   10,439.29x = 15,660.56 × 3,513.25
4. Step 4: Simplify right side
   10,439.29x = 55,019,444.85
5. Step 5: Solve for x
   x = 55,019,444.85/10,439.29
6. Step 6: Final answer
   x = 5,270.42