Finding the Fourth Proportional to 2,083.68, 3,111.99 and 1,888.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.68 : 3,111.99 = 1,888.30 : x
2. Step 2: Convert to fraction form
   2,083.68/3,111.99 = 1,888.30/x
3. Step 3: Cross multiply
   2,083.68x = 3,111.99 × 1,888.30
4. Step 4: Simplify right side
   2,083.68x = 5,876,370.72
5. Step 5: Solve for x
   x = 5,876,370.72/2,083.68
6. Step 6: Final answer
   x = 2,820.19