Finding the Fourth Proportional to 2,109.52, 2,909.99 and 1,269.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.52 : 2,909.99 = 1,269.72 : x
2. Step 2: Convert to fraction form
   2,109.52/2,909.99 = 1,269.72/x
3. Step 3: Cross multiply
   2,109.52x = 2,909.99 × 1,269.72
4. Step 4: Simplify right side
   2,109.52x = 3,694,875.68
5. Step 5: Solve for x
   x = 3,694,875.68/2,109.52
6. Step 6: Final answer
   x = 1,751.53