Finding the Fourth Proportional to 1,086.98, 1,498.91 and 850.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.98 : 1,498.91 = 850.50 : x
2. Step 2: Convert to fraction form
   1,086.98/1,498.91 = 850.50/x
3. Step 3: Cross multiply
   1,086.98x = 1,498.91 × 850.50
4. Step 4: Simplify right side
   1,086.98x = 1,274,818.70
5. Step 5: Solve for x
   x = 1,274,818.70/1,086.98
6. Step 6: Final answer
   x = 1,172.81