Finding the Fourth Proportional to 1,158.63, 1,598.89 and 661.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.63 : 1,598.89 = 661.24 : x
2. Step 2: Convert to fraction form
   1,158.63/1,598.89 = 661.24/x
3. Step 3: Cross multiply
   1,158.63x = 1,598.89 × 661.24
4. Step 4: Simplify right side
   1,158.63x = 1,057,250.02
5. Step 5: Solve for x
   x = 1,057,250.02/1,158.63
6. Step 6: Final answer
   x = 912.50