Finding the Fourth Proportional to 2,083.86, 2,875.71 and 1,139.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.86 : 2,875.71 = 1,139.66 : x
2. Step 2: Convert to fraction form
   2,083.86/2,875.71 = 1,139.66/x
3. Step 3: Cross multiply
   2,083.86x = 2,875.71 × 1,139.66
4. Step 4: Simplify right side
   2,083.86x = 3,277,331.66
5. Step 5: Solve for x
   x = 3,277,331.66/2,083.86
6. Step 6: Final answer
   x = 1,572.72