Finding the Fourth Proportional to 1,076.69, 1,486.15 and 634.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.69 : 1,486.15 = 634.43 : x
2. Step 2: Convert to fraction form
   1,076.69/1,486.15 = 634.43/x
3. Step 3: Cross multiply
   1,076.69x = 1,486.15 × 634.43
4. Step 4: Simplify right side
   1,076.69x = 942,860.27
5. Step 5: Solve for x
   x = 942,860.27/1,076.69
6. Step 6: Final answer
   x = 875.70