Finding the Fourth Proportional to 1,240.72, 1,711.73 and 743.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240.72 : 1,711.73 = 743.18 : x
2. Step 2: Convert to fraction form
   1,240.72/1,711.73 = 743.18/x
3. Step 3: Cross multiply
   1,240.72x = 1,711.73 × 743.18
4. Step 4: Simplify right side
   1,240.72x = 1,272,116.80
5. Step 5: Solve for x
   x = 1,272,116.80/1,240.72
6. Step 6: Final answer
   x = 1,025.31