Finding the Fourth Proportional to 1,153.33, 1,591.71 and 711.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.33 : 1,591.71 = 711.17 : x
2. Step 2: Convert to fraction form
   1,153.33/1,591.71 = 711.17/x
3. Step 3: Cross multiply
   1,153.33x = 1,591.71 × 711.17
4. Step 4: Simplify right side
   1,153.33x = 1,131,976.40
5. Step 5: Solve for x
   x = 1,131,976.40/1,153.33
6. Step 6: Final answer
   x = 981.49