Finding the Fourth Proportional to 2,109.24, 3,161.43 and 877.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.24 : 3,161.43 = 877.23 : x
2. Step 2: Convert to fraction form
   2,109.24/3,161.43 = 877.23/x
3. Step 3: Cross multiply
   2,109.24x = 3,161.43 × 877.23
4. Step 4: Simplify right side
   2,109.24x = 2,773,301.24
5. Step 5: Solve for x
   x = 2,773,301.24/2,109.24
6. Step 6: Final answer
   x = 1,314.83