Finding the Fourth Proportional to 12,740.80, 17,580.72 and 7,433.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,740.80 : 17,580.72 = 7,433.92 : x
2. Step 2: Convert to fraction form
   12,740.80/17,580.72 = 7,433.92/x
3. Step 3: Cross multiply
   12,740.80x = 17,580.72 × 7,433.92
4. Step 4: Simplify right side
   12,740.80x = 130,693,666.02
5. Step 5: Solve for x
   x = 130,693,666.02/12,740.80
6. Step 6: Final answer
   x = 10,257.89