Finding the Fourth Proportional to 2,109.19, 2,910.72 and 1,269.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.19 : 2,910.72 = 1,269.91 : x
2. Step 2: Convert to fraction form
   2,109.19/2,910.72 = 1,269.91/x
3. Step 3: Cross multiply
   2,109.19x = 2,910.72 × 1,269.91
4. Step 4: Simplify right side
   2,109.19x = 3,696,352.44
5. Step 5: Solve for x
   x = 3,696,352.44/2,109.19
6. Step 6: Final answer
   x = 1,752.50