Finding the Fourth Proportional to 1,380.82, 1,905.33 and 791.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.82 : 1,905.33 = 791.26 : x
2. Step 2: Convert to fraction form
   1,380.82/1,905.33 = 791.26/x
3. Step 3: Cross multiply
   1,380.82x = 1,905.33 × 791.26
4. Step 4: Simplify right side
   1,380.82x = 1,507,611.42
5. Step 5: Solve for x
   x = 1,507,611.42/1,380.82
6. Step 6: Final answer
   x = 1,091.82