Finding the Fourth Proportional to 1,132.83, 1,563.31 and 661.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.83 : 1,563.31 = 661.05 : x
2. Step 2: Convert to fraction form
   1,132.83/1,563.31 = 661.05/x
3. Step 3: Cross multiply
   1,132.83x = 1,563.31 × 661.05
4. Step 4: Simplify right side
   1,132.83x = 1,033,418.86
5. Step 5: Solve for x
   x = 1,033,418.86/1,132.83
6. Step 6: Final answer
   x = 912.25