Finding the Fourth Proportional to 1,047.94, 1,445.78 and 628.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.94 : 1,445.78 = 628.43 : x
2. Step 2: Convert to fraction form
   1,047.94/1,445.78 = 628.43/x
3. Step 3: Cross multiply
   1,047.94x = 1,445.78 × 628.43
4. Step 4: Simplify right side
   1,047.94x = 908,565.87
5. Step 5: Solve for x
   x = 908,565.87/1,047.94
6. Step 6: Final answer
   x = 867.00