Finding the Fourth Proportional to 2,140.83, 2,954.61 and 1,256.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.83 : 2,954.61 = 1,256.85 : x
2. Step 2: Convert to fraction form
   2,140.83/2,954.61 = 1,256.85/x
3. Step 3: Cross multiply
   2,140.83x = 2,954.61 × 1,256.85
4. Step 4: Simplify right side
   2,140.83x = 3,713,501.58
5. Step 5: Solve for x
   x = 3,713,501.58/2,140.83
6. Step 6: Final answer
   x = 1,734.61