Finding the Fourth Proportional to 2,088.77, 3,131.31 and 791.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.77 : 3,131.31 = 791.15 : x
2. Step 2: Convert to fraction form
   2,088.77/3,131.31 = 791.15/x
3. Step 3: Cross multiply
   2,088.77x = 3,131.31 × 791.15
4. Step 4: Simplify right side
   2,088.77x = 2,477,335.91
5. Step 5: Solve for x
   x = 2,477,335.91/2,088.77
6. Step 6: Final answer
   x = 1,186.03