Finding the Fourth Proportional to 2,109.25, 2,910.93 and 1,165.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.25 : 2,910.93 = 1,165.13 : x
2. Step 2: Convert to fraction form
   2,109.25/2,910.93 = 1,165.13/x
3. Step 3: Cross multiply
   2,109.25x = 2,910.93 × 1,165.13
4. Step 4: Simplify right side
   2,109.25x = 3,391,597.32
5. Step 5: Solve for x
   x = 3,391,597.32/2,109.25
6. Step 6: Final answer
   x = 1,607.97