Finding the Fourth Proportional to 2,083.92, 2,875.86 and 1,139.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.92 : 2,875.86 = 1,139.80 : x
2. Step 2: Convert to fraction form
   2,083.92/2,875.86 = 1,139.80/x
3. Step 3: Cross multiply
   2,083.92x = 2,875.86 × 1,139.80
4. Step 4: Simplify right side
   2,083.92x = 3,277,905.23
5. Step 5: Solve for x
   x = 3,277,905.23/2,083.92
6. Step 6: Final answer
   x = 1,572.95