Finding the Fourth Proportional to 1,385.28, 1,911.78 and 796.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.28 : 1,911.78 = 796.05 : x
2. Step 2: Convert to fraction form
   1,385.28/1,911.78 = 796.05/x
3. Step 3: Cross multiply
   1,385.28x = 1,911.78 × 796.05
4. Step 4: Simplify right side
   1,385.28x = 1,521,872.47
5. Step 5: Solve for x
   x = 1,521,872.47/1,385.28
6. Step 6: Final answer
   x = 1,098.60