Finding the Fourth Proportional to 1,076.89, 1,486.05 and 634.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.89 : 1,486.05 = 634.81 : x
2. Step 2: Convert to fraction form
   1,076.89/1,486.05 = 634.81/x
3. Step 3: Cross multiply
   1,076.89x = 1,486.05 × 634.81
4. Step 4: Simplify right side
   1,076.89x = 943,359.40
5. Step 5: Solve for x
   x = 943,359.40/1,076.89
6. Step 6: Final answer
   x = 876.00