Finding the Fourth Proportional to 1,160.37, 1,601.45 and 718.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.37 : 1,601.45 = 718.41 : x
2. Step 2: Convert to fraction form
   1,160.37/1,601.45 = 718.41/x
3. Step 3: Cross multiply
   1,160.37x = 1,601.45 × 718.41
4. Step 4: Simplify right side
   1,160.37x = 1,150,497.69
5. Step 5: Solve for x
   x = 1,150,497.69/1,160.37
6. Step 6: Final answer
   x = 991.49