Finding the Fourth Proportional to 12,640.73, 17,447.67 and 7,337.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,640.73 : 17,447.67 = 7,337.25 : x
2. Step 2: Convert to fraction form
   12,640.73/17,447.67 = 7,337.25/x
3. Step 3: Cross multiply
   12,640.73x = 17,447.67 × 7,337.25
4. Step 4: Simplify right side
   12,640.73x = 128,017,916.71
5. Step 5: Solve for x
   x = 128,017,916.71/12,640.73
6. Step 6: Final answer
   x = 10,127.42