Finding the Fourth Proportional to 1,165.42, 1,608.27 and 661.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.42 : 1,608.27 = 661.37 : x
2. Step 2: Convert to fraction form
   1,165.42/1,608.27 = 661.37/x
3. Step 3: Cross multiply
   1,165.42x = 1,608.27 × 661.37
4. Step 4: Simplify right side
   1,165.42x = 1,063,658.28
5. Step 5: Solve for x
   x = 1,063,658.28/1,165.42
6. Step 6: Final answer
   x = 912.68