Finding the Fourth Proportional to 1,047.90, 1,446.04 and 628.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.90 : 1,446.04 = 628.29 : x
2. Step 2: Convert to fraction form
   1,047.90/1,446.04 = 628.29/x
3. Step 3: Cross multiply
   1,047.90x = 1,446.04 × 628.29
4. Step 4: Simplify right side
   1,047.90x = 908,522.10
5. Step 5: Solve for x
   x = 908,522.10/1,047.90
6. Step 6: Final answer
   x = 866.99