Finding the Fourth Proportional to 12,707.60, 17,535.98 and 7,042.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,707.60 : 17,535.98 = 7,042.43 : x
2. Step 2: Convert to fraction form
   12,707.60/17,535.98 = 7,042.43/x
3. Step 3: Cross multiply
   12,707.60x = 17,535.98 × 7,042.43
4. Step 4: Simplify right side
   12,707.60x = 123,495,876.42
5. Step 5: Solve for x
   x = 123,495,876.42/12,707.60
6. Step 6: Final answer
   x = 9,718.27