Finding the Fourth Proportional to 1,160.53, 1,601.83 and 718.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.53 : 1,601.83 = 718.17 : x
2. Step 2: Convert to fraction form
   1,160.53/1,601.83 = 718.17/x
3. Step 3: Cross multiply
   1,160.53x = 1,601.83 × 718.17
4. Step 4: Simplify right side
   1,160.53x = 1,150,377.10
5. Step 5: Solve for x
   x = 1,150,377.10/1,160.53
6. Step 6: Final answer
   x = 991.25