Finding the Fourth Proportional to 2,784.38, 4,176.50 and 1,139.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.38 : 4,176.50 = 1,139.81 : x
2. Step 2: Convert to fraction form
   2,784.38/4,176.50 = 1,139.81/x
3. Step 3: Cross multiply
   2,784.38x = 4,176.50 × 1,139.81
4. Step 4: Simplify right side
   2,784.38x = 4,760,389.88
5. Step 5: Solve for x
   x = 4,760,389.88/2,784.38
6. Step 6: Final answer
   x = 1,709.68