Finding the Fourth Proportional to 1,385.98, 1,912.92 and 796.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.98 : 1,912.92 = 796.90 : x
2. Step 2: Convert to fraction form
   1,385.98/1,912.92 = 796.90/x
3. Step 3: Cross multiply
   1,385.98x = 1,912.92 × 796.90
4. Step 4: Simplify right side
   1,385.98x = 1,524,405.95
5. Step 5: Solve for x
   x = 1,524,405.95/1,385.98
6. Step 6: Final answer
   x = 1,099.88