Finding the Fourth Proportional to 1,385.83, 1,912.58 and 796.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.83 : 1,912.58 = 796.42 : x
2. Step 2: Convert to fraction form
   1,385.83/1,912.58 = 796.42/x
3. Step 3: Cross multiply
   1,385.83x = 1,912.58 × 796.42
4. Step 4: Simplify right side
   1,385.83x = 1,523,216.96
5. Step 5: Solve for x
   x = 1,523,216.96/1,385.83
6. Step 6: Final answer
   x = 1,099.14