Finding the Fourth Proportional to 1,240.34, 1,711.67 and 743.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240.34 : 1,711.67 = 743.05 : x
2. Step 2: Convert to fraction form
   1,240.34/1,711.67 = 743.05/x
3. Step 3: Cross multiply
   1,240.34x = 1,711.67 × 743.05
4. Step 4: Simplify right side
   1,240.34x = 1,271,856.39
5. Step 5: Solve for x
   x = 1,271,856.39/1,240.34
6. Step 6: Final answer
   x = 1,025.41