Finding the Fourth Proportional to 2,109.59, 2,911.17 and 1,165.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.59 : 2,911.17 = 1,165.36 : x
2. Step 2: Convert to fraction form
   2,109.59/2,911.17 = 1,165.36/x
3. Step 3: Cross multiply
   2,109.59x = 2,911.17 × 1,165.36
4. Step 4: Simplify right side
   2,109.59x = 3,392,547.97
5. Step 5: Solve for x
   x = 3,392,547.97/2,109.59
6. Step 6: Final answer
   x = 1,608.16