Finding the Fourth Proportional to 2,109.36, 2,910.60 and 1,323.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.36 : 2,910.60 = 1,323.12 : x
2. Step 2: Convert to fraction form
   2,109.36/2,910.60 = 1,323.12/x
3. Step 3: Cross multiply
   2,109.36x = 2,910.60 × 1,323.12
4. Step 4: Simplify right side
   2,109.36x = 3,851,073.07
5. Step 5: Solve for x
   x = 3,851,073.07/2,109.36
6. Step 6: Final answer
   x = 1,825.71