Finding the Fourth Proportional to 1,118.94, 1,675.98 and 684.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.94 : 1,675.98 = 684.78 : x
2. Step 2: Convert to fraction form
   1,118.94/1,675.98 = 684.78/x
3. Step 3: Cross multiply
   1,118.94x = 1,675.98 × 684.78
4. Step 4: Simplify right side
   1,118.94x = 1,147,677.58
5. Step 5: Solve for x
   x = 1,147,677.58/1,118.94
6. Step 6: Final answer
   x = 1,025.68