Finding the Fourth Proportional to 1,086.49, 1,630.55 and 798.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.49 : 1,630.55 = 798.67 : x
2. Step 2: Convert to fraction form
   1,086.49/1,630.55 = 798.67/x
3. Step 3: Cross multiply
   1,086.49x = 1,630.55 × 798.67
4. Step 4: Simplify right side
   1,086.49x = 1,302,271.37
5. Step 5: Solve for x
   x = 1,302,271.37/1,086.49
6. Step 6: Final answer
   x = 1,198.60