Finding the Fourth Proportional to 1,132.88, 1,563.37 and 661.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.88 : 1,563.37 = 661.10 : x
2. Step 2: Convert to fraction form
   1,132.88/1,563.37 = 661.10/x
3. Step 3: Cross multiply
   1,132.88x = 1,563.37 × 661.10
4. Step 4: Simplify right side
   1,132.88x = 1,033,539.42
5. Step 5: Solve for x
   x = 1,033,539.42/1,132.88
6. Step 6: Final answer
   x = 912.32