Finding the Fourth Proportional to 1,385.66, 1,912.59 and 796.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.66 : 1,912.59 = 796.38 : x
2. Step 2: Convert to fraction form
   1,385.66/1,912.59 = 796.38/x
3. Step 3: Cross multiply
   1,385.66x = 1,912.59 × 796.38
4. Step 4: Simplify right side
   1,385.66x = 1,523,148.42
5. Step 5: Solve for x
   x = 1,523,148.42/1,385.66
6. Step 6: Final answer
   x = 1,099.23