Finding the Fourth Proportional to 2,781.95, 4,173.83 and 1,139.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,781.95 : 4,173.83 = 1,139.27 : x
2. Step 2: Convert to fraction form
   2,781.95/4,173.83 = 1,139.27/x
3. Step 3: Cross multiply
   2,781.95x = 4,173.83 × 1,139.27
4. Step 4: Simplify right side
   2,781.95x = 4,755,097.01
5. Step 5: Solve for x
   x = 4,755,097.01/2,781.95
6. Step 6: Final answer
   x = 1,709.27