Finding the Fourth Proportional to 1,132.89, 1,563.48 and 628.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.89 : 1,563.48 = 628.77 : x
2. Step 2: Convert to fraction form
   1,132.89/1,563.48 = 628.77/x
3. Step 3: Cross multiply
   1,132.89x = 1,563.48 × 628.77
4. Step 4: Simplify right side
   1,132.89x = 983,066.18
5. Step 5: Solve for x
   x = 983,066.18/1,132.89
6. Step 6: Final answer
   x = 867.75