Finding the Fourth Proportional to 1,381.32, 1,906.23 and 791.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.32 : 1,906.23 = 791.94 : x
2. Step 2: Convert to fraction form
   1,381.32/1,906.23 = 791.94/x
3. Step 3: Cross multiply
   1,381.32x = 1,906.23 × 791.94
4. Step 4: Simplify right side
   1,381.32x = 1,509,619.79
5. Step 5: Solve for x
   x = 1,509,619.79/1,381.32
6. Step 6: Final answer
   x = 1,092.88