Finding the Fourth Proportional to 1,426.15, 1,967.90 and 796.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.15 : 1,967.90 = 796.60 : x
2. Step 2: Convert to fraction form
   1,426.15/1,967.90 = 796.60/x
3. Step 3: Cross multiply
   1,426.15x = 1,967.90 × 796.60
4. Step 4: Simplify right side
   1,426.15x = 1,567,624.18
5. Step 5: Solve for x
   x = 1,567,624.18/1,426.15
6. Step 6: Final answer
   x = 1,099.20