Finding the Fourth Proportional to 1,158.42, 1,598.50 and 661.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.42 : 1,598.50 = 661.02 : x
2. Step 2: Convert to fraction form
   1,158.42/1,598.50 = 661.02/x
3. Step 3: Cross multiply
   1,158.42x = 1,598.50 × 661.02
4. Step 4: Simplify right side
   1,158.42x = 1,056,640.47
5. Step 5: Solve for x
   x = 1,056,640.47/1,158.42
6. Step 6: Final answer
   x = 912.14