Finding the Fourth Proportional to 1,020.18, 1,407.89 and 627.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.18 : 1,407.89 = 627.33 : x
2. Step 2: Convert to fraction form
   1,020.18/1,407.89 = 627.33/x
3. Step 3: Cross multiply
   1,020.18x = 1,407.89 × 627.33
4. Step 4: Simplify right side
   1,020.18x = 883,208.50
5. Step 5: Solve for x
   x = 883,208.50/1,020.18
6. Step 6: Final answer
   x = 865.74