Finding the Fourth Proportional to 1,076.18, 1,485.32 and 634.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.18 : 1,485.32 = 634.05 : x
2. Step 2: Convert to fraction form
   1,076.18/1,485.32 = 634.05/x
3. Step 3: Cross multiply
   1,076.18x = 1,485.32 × 634.05
4. Step 4: Simplify right side
   1,076.18x = 941,763.98
5. Step 5: Solve for x
   x = 941,763.98/1,076.18
6. Step 6: Final answer
   x = 875.10