Finding the Fourth Proportional to 1,385.79, 1,912.47 and 796.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.79 : 1,912.47 = 796.41 : x
2. Step 2: Convert to fraction form
   1,385.79/1,912.47 = 796.41/x
3. Step 3: Cross multiply
   1,385.79x = 1,912.47 × 796.41
4. Step 4: Simplify right side
   1,385.79x = 1,523,110.23
5. Step 5: Solve for x
   x = 1,523,110.23/1,385.79
6. Step 6: Final answer
   x = 1,099.09