Finding the Fourth Proportional to 1,158.56, 1,598.94 and 661.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.56 : 1,598.94 = 661.27 : x
2. Step 2: Convert to fraction form
   1,158.56/1,598.94 = 661.27/x
3. Step 3: Cross multiply
   1,158.56x = 1,598.94 × 661.27
4. Step 4: Simplify right side
   1,158.56x = 1,057,324.06
5. Step 5: Solve for x
   x = 1,057,324.06/1,158.56
6. Step 6: Final answer
   x = 912.62