Finding the Fourth Proportional to 1,157.95, 1,597.89 and 660.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.95 : 1,597.89 = 660.49 : x
2. Step 2: Convert to fraction form
   1,157.95/1,597.89 = 660.49/x
3. Step 3: Cross multiply
   1,157.95x = 1,597.89 × 660.49
4. Step 4: Simplify right side
   1,157.95x = 1,055,389.89
5. Step 5: Solve for x
   x = 1,055,389.89/1,157.95
6. Step 6: Final answer
   x = 911.43