Finding the Fourth Proportional to 1,381.45, 1,906.56 and 791.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.45 : 1,906.56 = 791.98 : x
2. Step 2: Convert to fraction form
   1,381.45/1,906.56 = 791.98/x
3. Step 3: Cross multiply
   1,381.45x = 1,906.56 × 791.98
4. Step 4: Simplify right side
   1,381.45x = 1,509,956.20
5. Step 5: Solve for x
   x = 1,509,956.20/1,381.45
6. Step 6: Final answer
   x = 1,093.03