Finding the Fourth Proportional to 1,385.86, 1,912.41 and 796.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.86 : 1,912.41 = 796.40 : x
2. Step 2: Convert to fraction form
   1,385.86/1,912.41 = 796.40/x
3. Step 3: Cross multiply
   1,385.86x = 1,912.41 × 796.40
4. Step 4: Simplify right side
   1,385.86x = 1,523,043.32
5. Step 5: Solve for x
   x = 1,523,043.32/1,385.86
6. Step 6: Final answer
   x = 1,098.99