Finding the Fourth Proportional to 1,076.58, 1,485.18 and 634.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.58 : 1,485.18 = 634.23 : x
2. Step 2: Convert to fraction form
   1,076.58/1,485.18 = 634.23/x
3. Step 3: Cross multiply
   1,076.58x = 1,485.18 × 634.23
4. Step 4: Simplify right side
   1,076.58x = 941,945.71
5. Step 5: Solve for x
   x = 941,945.71/1,076.58
6. Step 6: Final answer
   x = 874.94