Finding the Fourth Proportional to 1,086.18, 1,630.07 and 675.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.18 : 1,630.07 = 675.91 : x
2. Step 2: Convert to fraction form
   1,086.18/1,630.07 = 675.91/x
3. Step 3: Cross multiply
   1,086.18x = 1,630.07 × 675.91
4. Step 4: Simplify right side
   1,086.18x = 1,101,780.61
5. Step 5: Solve for x
   x = 1,101,780.61/1,086.18
6. Step 6: Final answer
   x = 1,014.36