Finding the Fourth Proportional to 2,088.72, 3,131.28 and 791.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.72 : 3,131.28 = 791.12 : x
2. Step 2: Convert to fraction form
   2,088.72/3,131.28 = 791.12/x
3. Step 3: Cross multiply
   2,088.72x = 3,131.28 × 791.12
4. Step 4: Simplify right side
   2,088.72x = 2,477,218.23
5. Step 5: Solve for x
   x = 2,477,218.23/2,088.72
6. Step 6: Final answer
   x = 1,186.00