Finding the Fourth Proportional to 1,131.76, 1,562.28 and 739.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.76 : 1,562.28 = 739.40 : x
2. Step 2: Convert to fraction form
   1,131.76/1,562.28 = 739.40/x
3. Step 3: Cross multiply
   1,131.76x = 1,562.28 × 739.40
4. Step 4: Simplify right side
   1,131.76x = 1,155,149.83
5. Step 5: Solve for x
   x = 1,155,149.83/1,131.76
6. Step 6: Final answer
   x = 1,020.67