Finding the Fourth Proportional to 1,381.01, 1,906.04 and 791.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.01 : 1,906.04 = 791.43 : x
2. Step 2: Convert to fraction form
   1,381.01/1,906.04 = 791.43/x
3. Step 3: Cross multiply
   1,381.01x = 1,906.04 × 791.43
4. Step 4: Simplify right side
   1,381.01x = 1,508,493.28
5. Step 5: Solve for x
   x = 1,508,493.28/1,381.01
6. Step 6: Final answer
   x = 1,092.31