Finding the Fourth Proportional to 2,073.78, 3,111.17 and 775.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.78 : 3,111.17 = 775.26 : x
2. Step 2: Convert to fraction form
   2,073.78/3,111.17 = 775.26/x
3. Step 3: Cross multiply
   2,073.78x = 3,111.17 × 775.26
4. Step 4: Simplify right side
   2,073.78x = 2,411,961.78
5. Step 5: Solve for x
   x = 2,411,961.78/2,073.78
6. Step 6: Final answer
   x = 1,163.08