Finding the Fourth Proportional to 1,076.59, 1,485.76 and 634.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.59 : 1,485.76 = 634.53 : x
2. Step 2: Convert to fraction form
   1,076.59/1,485.76 = 634.53/x
3. Step 3: Cross multiply
   1,076.59x = 1,485.76 × 634.53
4. Step 4: Simplify right side
   1,076.59x = 942,759.29
5. Step 5: Solve for x
   x = 942,759.29/1,076.59
6. Step 6: Final answer
   x = 875.69