Finding the Fourth Proportional to 1,076.38, 1,485.17 and 634.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.38 : 1,485.17 = 634.12 : x
2. Step 2: Convert to fraction form
   1,076.38/1,485.17 = 634.12/x
3. Step 3: Cross multiply
   1,076.38x = 1,485.17 × 634.12
4. Step 4: Simplify right side
   1,076.38x = 941,768.57
5. Step 5: Solve for x
   x = 941,768.57/1,076.38
6. Step 6: Final answer
   x = 874.94