Finding the Fourth Proportional to 9,639.43, 13,302.51 and 5,660.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,639.43 : 13,302.51 = 5,660.62 : x
2. Step 2: Convert to fraction form
   9,639.43/13,302.51 = 5,660.62/x
3. Step 3: Cross multiply
   9,639.43x = 13,302.51 × 5,660.62
4. Step 4: Simplify right side
   9,639.43x = 75,300,454.16
5. Step 5: Solve for x
   x = 75,300,454.16/9,639.43
6. Step 6: Final answer
   x = 7,811.71