Finding the Fourth Proportional to 2,108.79, 2,910.90 and 1,269.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.79 : 2,910.90 = 1,269.53 : x
2. Step 2: Convert to fraction form
   2,108.79/2,910.90 = 1,269.53/x
3. Step 3: Cross multiply
   2,108.79x = 2,910.90 × 1,269.53
4. Step 4: Simplify right side
   2,108.79x = 3,695,474.88
5. Step 5: Solve for x
   x = 3,695,474.88/2,108.79
6. Step 6: Final answer
   x = 1,752.42