Finding the Fourth Proportional to 1,048.43, 1,446.72 and 628.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.43 : 1,446.72 = 628.77 : x
2. Step 2: Convert to fraction form
   1,048.43/1,446.72 = 628.77/x
3. Step 3: Cross multiply
   1,048.43x = 1,446.72 × 628.77
4. Step 4: Simplify right side
   1,048.43x = 909,646.90
5. Step 5: Solve for x
   x = 909,646.90/1,048.43
6. Step 6: Final answer
   x = 867.63