Finding the Fourth Proportional to 2,784.84, 4,175.42 and 1,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.84 : 4,175.42 = 1,139.72 : x
2. Step 2: Convert to fraction form
   2,784.84/4,175.42 = 1,139.72/x
3. Step 3: Cross multiply
   2,784.84x = 4,175.42 × 1,139.72
4. Step 4: Simplify right side
   2,784.84x = 4,758,809.68
5. Step 5: Solve for x
   x = 4,758,809.68/2,784.84
6. Step 6: Final answer
   x = 1,708.83