Finding the Fourth Proportional to 1,076.76, 1,485.81 and 634.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.76 : 1,485.81 = 634.50 : x
2. Step 2: Convert to fraction form
   1,076.76/1,485.81 = 634.50/x
3. Step 3: Cross multiply
   1,076.76x = 1,485.81 × 634.50
4. Step 4: Simplify right side
   1,076.76x = 942,746.45
5. Step 5: Solve for x
   x = 942,746.45/1,076.76
6. Step 6: Final answer
   x = 875.54