Finding the Fourth Proportional to 1,834.78, 2,748.51 and 1,139.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,834.78 : 2,748.51 = 1,139.80 : x
2. Step 2: Convert to fraction form
   1,834.78/2,748.51 = 1,139.80/x
3. Step 3: Cross multiply
   1,834.78x = 2,748.51 × 1,139.80
4. Step 4: Simplify right side
   1,834.78x = 3,132,751.70
5. Step 5: Solve for x
   x = 3,132,751.70/1,834.78
6. Step 6: Final answer
   x = 1,707.43