Finding the Fourth Proportional to 12,265.89, 16,921.67 and 9,602.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,265.89 : 16,921.67 = 9,602.61 : x
2. Step 2: Convert to fraction form
   12,265.89/16,921.67 = 9,602.61/x
3. Step 3: Cross multiply
   12,265.89x = 16,921.67 × 9,602.61
4. Step 4: Simplify right side
   12,265.89x = 162,492,197.56
5. Step 5: Solve for x
   x = 162,492,197.56/12,265.89
6. Step 6: Final answer
   x = 13,247.49