Finding the Fourth Proportional to 2,109.26, 2,910.69 and 1,165.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.26 : 2,910.69 = 1,165.07 : x
2. Step 2: Convert to fraction form
   2,109.26/2,910.69 = 1,165.07/x
3. Step 3: Cross multiply
   2,109.26x = 2,910.69 × 1,165.07
4. Step 4: Simplify right side
   2,109.26x = 3,391,143.04
5. Step 5: Solve for x
   x = 3,391,143.04/2,109.26
6. Step 6: Final answer
   x = 1,607.74