Finding the Fourth Proportional to 1,157.92, 1,597.89 and 660.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.92 : 1,597.89 = 660.51 : x
2. Step 2: Convert to fraction form
   1,157.92/1,597.89 = 660.51/x
3. Step 3: Cross multiply
   1,157.92x = 1,597.89 × 660.51
4. Step 4: Simplify right side
   1,157.92x = 1,055,424.80
5. Step 5: Solve for x
   x = 1,055,424.80/1,157.92
6. Step 6: Final answer
   x = 911.49