Finding the Fourth Proportional to 1,160.55, 1,601.48 and 718.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.55 : 1,601.48 = 718.38 : x
2. Step 2: Convert to fraction form
   1,160.55/1,601.48 = 718.38/x
3. Step 3: Cross multiply
   1,160.55x = 1,601.48 × 718.38
4. Step 4: Simplify right side
   1,160.55x = 1,150,473.00
5. Step 5: Solve for x
   x = 1,150,473.00/1,160.55
6. Step 6: Final answer
   x = 991.32