Finding the Fourth Proportional to 1,158.12, 1,598.33 and 660.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.12 : 1,598.33 = 660.69 : x
2. Step 2: Convert to fraction form
   1,158.12/1,598.33 = 660.69/x
3. Step 3: Cross multiply
   1,158.12x = 1,598.33 × 660.69
4. Step 4: Simplify right side
   1,158.12x = 1,056,002.30
5. Step 5: Solve for x
   x = 1,056,002.30/1,158.12
6. Step 6: Final answer
   x = 911.82