Finding the Fourth Proportional to 2,784.22, 4,174.49 and 1,139.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.22 : 4,174.49 = 1,139.11 : x
2. Step 2: Convert to fraction form
   2,784.22/4,174.49 = 1,139.11/x
3. Step 3: Cross multiply
   2,784.22x = 4,174.49 × 1,139.11
4. Step 4: Simplify right side
   2,784.22x = 4,755,195.72
5. Step 5: Solve for x
   x = 4,755,195.72/2,784.22
6. Step 6: Final answer
   x = 1,707.91