Finding the Fourth Proportional to 1,048.47, 1,446.83 and 628.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.47 : 1,446.83 = 628.62 : x
2. Step 2: Convert to fraction form
   1,048.47/1,446.83 = 628.62/x
3. Step 3: Cross multiply
   1,048.47x = 1,446.83 × 628.62
4. Step 4: Simplify right side
   1,048.47x = 909,500.61
5. Step 5: Solve for x
   x = 909,500.61/1,048.47
6. Step 6: Final answer
   x = 867.45