Finding the Fourth Proportional to 1,240.67, 1,711.69 and 743.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240.67 : 1,711.69 = 743.47 : x
2. Step 2: Convert to fraction form
   1,240.67/1,711.69 = 743.47/x
3. Step 3: Cross multiply
   1,240.67x = 1,711.69 × 743.47
4. Step 4: Simplify right side
   1,240.67x = 1,272,577.89
5. Step 5: Solve for x
   x = 1,272,577.89/1,240.67
6. Step 6: Final answer
   x = 1,025.72