Finding the Fourth Proportional to 1,076.18, 1,485.02 and 627.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.18 : 1,485.02 = 627.98 : x
2. Step 2: Convert to fraction form
   1,076.18/1,485.02 = 627.98/x
3. Step 3: Cross multiply
   1,076.18x = 1,485.02 × 627.98
4. Step 4: Simplify right side
   1,076.18x = 932,562.86
5. Step 5: Solve for x
   x = 932,562.86/1,076.18
6. Step 6: Final answer
   x = 866.55