Finding the Fourth Proportional to 1,157.94, 1,597.98 and 660.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.94 : 1,597.98 = 660.53 : x
2. Step 2: Convert to fraction form
   1,157.94/1,597.98 = 660.53/x
3. Step 3: Cross multiply
   1,157.94x = 1,597.98 × 660.53
4. Step 4: Simplify right side
   1,157.94x = 1,055,505.74
5. Step 5: Solve for x
   x = 1,055,505.74/1,157.94
6. Step 6: Final answer
   x = 911.54