Finding the Fourth Proportional to 2,090.31, 3,134.45 and 791.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.31 : 3,134.45 = 791.88 : x
2. Step 2: Convert to fraction form
   2,090.31/3,134.45 = 791.88/x
3. Step 3: Cross multiply
   2,090.31x = 3,134.45 × 791.88
4. Step 4: Simplify right side
   2,090.31x = 2,482,104.31
5. Step 5: Solve for x
   x = 2,482,104.31/2,090.31
6. Step 6: Final answer
   x = 1,187.43