Finding the Fourth Proportional to 1,238.50, 1,708.82 and 796.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.50 : 1,708.82 = 796.99 : x
2. Step 2: Convert to fraction form
   1,238.50/1,708.82 = 796.99/x
3. Step 3: Cross multiply
   1,238.50x = 1,708.82 × 796.99
4. Step 4: Simplify right side
   1,238.50x = 1,361,905.90
5. Step 5: Solve for x
   x = 1,361,905.90/1,238.50
6. Step 6: Final answer
   x = 1,099.64