Finding the Fourth Proportional to 9,606.75, 13,257.72 and 5,415

Step by Step Solution

1. Step 1: Write the proportion equation
   9,606.75 : 13,257.72 = 5,415 : x
2. Step 2: Convert to fraction form
   9,606.75/13,257.72 = 5,415/x
3. Step 3: Cross multiply
   9,606.75x = 13,257.72 × 5,415
4. Step 4: Simplify right side
   9,606.75x = 71,790,553.80
5. Step 5: Solve for x
   x = 71,790,553.80/9,606.75
6. Step 6: Final answer
   x = 7,472.93