Finding the Fourth Proportional to 1,157.59, 1,597.42 and 660.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.59 : 1,597.42 = 660.05 : x
2. Step 2: Convert to fraction form
   1,157.59/1,597.42 = 660.05/x
3. Step 3: Cross multiply
   1,157.59x = 1,597.42 × 660.05
4. Step 4: Simplify right side
   1,157.59x = 1,054,375.90
5. Step 5: Solve for x
   x = 1,054,375.90/1,157.59
6. Step 6: Final answer
   x = 910.84