Finding the Fourth Proportional to 1,158.23, 1,597.96 and 660.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.23 : 1,597.96 = 660.51 : x
2. Step 2: Convert to fraction form
   1,158.23/1,597.96 = 660.51/x
3. Step 3: Cross multiply
   1,158.23x = 1,597.96 × 660.51
4. Step 4: Simplify right side
   1,158.23x = 1,055,457.27
5. Step 5: Solve for x
   x = 1,055,457.27/1,158.23
6. Step 6: Final answer
   x = 911.27