Finding the Fourth Proportional to 1,076.42, 1,485.41 and 634.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.42 : 1,485.41 = 634.30 : x
2. Step 2: Convert to fraction form
   1,076.42/1,485.41 = 634.30/x
3. Step 3: Cross multiply
   1,076.42x = 1,485.41 × 634.30
4. Step 4: Simplify right side
   1,076.42x = 942,188.68
5. Step 5: Solve for x
   x = 942,188.68/1,076.42
6. Step 6: Final answer
   x = 875.30