Finding the Fourth Proportional to 2,108.78, 2,910.22 and 1,269.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.78 : 2,910.22 = 1,269.74 : x
2. Step 2: Convert to fraction form
   2,108.78/2,910.22 = 1,269.74/x
3. Step 3: Cross multiply
   2,108.78x = 2,910.22 × 1,269.74
4. Step 4: Simplify right side
   2,108.78x = 3,695,226.84
5. Step 5: Solve for x
   x = 3,695,226.84/2,108.78
6. Step 6: Final answer
   x = 1,752.31