Finding the Fourth Proportional to 1,158.81, 1,598.83 and 661.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.81 : 1,598.83 = 661.27 : x
2. Step 2: Convert to fraction form
   1,158.81/1,598.83 = 661.27/x
3. Step 3: Cross multiply
   1,158.81x = 1,598.83 × 661.27
4. Step 4: Simplify right side
   1,158.81x = 1,057,251.97
5. Step 5: Solve for x
   x = 1,057,251.97/1,158.81
6. Step 6: Final answer
   x = 912.36