Finding the Fourth Proportional to 1,132.96, 1,563.46 and 628.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.96 : 1,563.46 = 628.78 : x
2. Step 2: Convert to fraction form
   1,132.96/1,563.46 = 628.78/x
3. Step 3: Cross multiply
   1,132.96x = 1,563.46 × 628.78
4. Step 4: Simplify right side
   1,132.96x = 983,072.15
5. Step 5: Solve for x
   x = 983,072.15/1,132.96
6. Step 6: Final answer
   x = 867.70