Finding the Fourth Proportional to 2,783.17, 4,176.47 and 1,139.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.17 : 4,176.47 = 1,139.73 : x
2. Step 2: Convert to fraction form
   2,783.17/4,176.47 = 1,139.73/x
3. Step 3: Cross multiply
   2,783.17x = 4,176.47 × 1,139.73
4. Step 4: Simplify right side
   2,783.17x = 4,760,048.15
5. Step 5: Solve for x
   x = 4,760,048.15/2,783.17
6. Step 6: Final answer
   x = 1,710.30