Finding the Fourth Proportional to 2,610.78, 3,911.76 and 1,292.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.78 : 3,911.76 = 1,292.77 : x
2. Step 2: Convert to fraction form
   2,610.78/3,911.76 = 1,292.77/x
3. Step 3: Cross multiply
   2,610.78x = 3,911.76 × 1,292.77
4. Step 4: Simplify right side
   2,610.78x = 5,057,005.98
5. Step 5: Solve for x
   x = 5,057,005.98/2,610.78
6. Step 6: Final answer
   x = 1,936.97