Finding the Fourth Proportional to 1,381.49, 1,906.07 and 791.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.49 : 1,906.07 = 791.99 : x
2. Step 2: Convert to fraction form
   1,381.49/1,906.07 = 791.99/x
3. Step 3: Cross multiply
   1,381.49x = 1,906.07 × 791.99
4. Step 4: Simplify right side
   1,381.49x = 1,509,574.89
5. Step 5: Solve for x
   x = 1,509,574.89/1,381.49
6. Step 6: Final answer
   x = 1,092.72