Finding the Fourth Proportional to 1,048.34, 1,446.81 and 628.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.34 : 1,446.81 = 628.81 : x
2. Step 2: Convert to fraction form
   1,048.34/1,446.81 = 628.81/x
3. Step 3: Cross multiply
   1,048.34x = 1,446.81 × 628.81
4. Step 4: Simplify right side
   1,048.34x = 909,768.60
5. Step 5: Solve for x
   x = 909,768.60/1,048.34
6. Step 6: Final answer
   x = 867.82