Finding the Fourth Proportional to 1,086.62, 1,631.90 and 676.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.62 : 1,631.90 = 676.55 : x
2. Step 2: Convert to fraction form
   1,086.62/1,631.90 = 676.55/x
3. Step 3: Cross multiply
   1,086.62x = 1,631.90 × 676.55
4. Step 4: Simplify right side
   1,086.62x = 1,104,063.91
5. Step 5: Solve for x
   x = 1,104,063.91/1,086.62
6. Step 6: Final answer
   x = 1,016.06