Finding the Fourth Proportional to 1,157.45, 1,597.39 and 660.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.45 : 1,597.39 = 660.09 : x
2. Step 2: Convert to fraction form
   1,157.45/1,597.39 = 660.09/x
3. Step 3: Cross multiply
   1,157.45x = 1,597.39 × 660.09
4. Step 4: Simplify right side
   1,157.45x = 1,054,417.86
5. Step 5: Solve for x
   x = 1,054,417.86/1,157.45
6. Step 6: Final answer
   x = 910.98