Finding the Fourth Proportional to 9,639.36, 13,302.42 and 5,660.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,639.36 : 13,302.42 = 5,660.52 : x
2. Step 2: Convert to fraction form
   9,639.36/13,302.42 = 5,660.52/x
3. Step 3: Cross multiply
   9,639.36x = 13,302.42 × 5,660.52
4. Step 4: Simplify right side
   9,639.36x = 75,298,614.46
5. Step 5: Solve for x
   x = 75,298,614.46/9,639.36
6. Step 6: Final answer
   x = 7,811.58