Finding the Fourth Proportional to 1,381.24, 1,906.06 and 791.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.24 : 1,906.06 = 791.74 : x
2. Step 2: Convert to fraction form
   1,381.24/1,906.06 = 791.74/x
3. Step 3: Cross multiply
   1,381.24x = 1,906.06 × 791.74
4. Step 4: Simplify right side
   1,381.24x = 1,509,103.94
5. Step 5: Solve for x
   x = 1,509,103.94/1,381.24
6. Step 6: Final answer
   x = 1,092.57