Finding the Fourth Proportional to 2,083.83, 2,875.15 and 1,385.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.83 : 2,875.15 = 1,385.20 : x
2. Step 2: Convert to fraction form
   2,083.83/2,875.15 = 1,385.20/x
3. Step 3: Cross multiply
   2,083.83x = 2,875.15 × 1,385.20
4. Step 4: Simplify right side
   2,083.83x = 3,982,655.31
5. Step 5: Solve for x
   x = 3,982,655.31/2,083.83
6. Step 6: Final answer
   x = 1,911.22