Finding the Fourth Proportional to 1,158.32, 1,598.62 and 661.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.32 : 1,598.62 = 661.03 : x
2. Step 2: Convert to fraction form
   1,158.32/1,598.62 = 661.03/x
3. Step 3: Cross multiply
   1,158.32x = 1,598.62 × 661.03
4. Step 4: Simplify right side
   1,158.32x = 1,056,736.12
5. Step 5: Solve for x
   x = 1,056,736.12/1,158.32
6. Step 6: Final answer
   x = 912.30