Finding the Fourth Proportional to 2,143.75, 3,218.33 and 1,853.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.75 : 3,218.33 = 1,853.10 : x
2. Step 2: Convert to fraction form
   2,143.75/3,218.33 = 1,853.10/x
3. Step 3: Cross multiply
   2,143.75x = 3,218.33 × 1,853.10
4. Step 4: Simplify right side
   2,143.75x = 5,963,887.32
5. Step 5: Solve for x
   x = 5,963,887.32/2,143.75
6. Step 6: Final answer
   x = 2,781.99