Finding the Fourth Proportional to 1,076.52, 1,485.30 and 634.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.52 : 1,485.30 = 634.56 : x
2. Step 2: Convert to fraction form
   1,076.52/1,485.30 = 634.56/x
3. Step 3: Cross multiply
   1,076.52x = 1,485.30 × 634.56
4. Step 4: Simplify right side
   1,076.52x = 942,511.97
5. Step 5: Solve for x
   x = 942,511.97/1,076.52
6. Step 6: Final answer
   x = 875.52