Finding the Fourth Proportional to 1,076.45, 1,485.53 and 634.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.45 : 1,485.53 = 634.73 : x
2. Step 2: Convert to fraction form
   1,076.45/1,485.53 = 634.73/x
3. Step 3: Cross multiply
   1,076.45x = 1,485.53 × 634.73
4. Step 4: Simplify right side
   1,076.45x = 942,899.86
5. Step 5: Solve for x
   x = 942,899.86/1,076.45
6. Step 6: Final answer
   x = 875.94