Finding the Fourth Proportional to 2,057.13, 3,081.78 and 1,274.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.13 : 3,081.78 = 1,274.67 : x
2. Step 2: Convert to fraction form
   2,057.13/3,081.78 = 1,274.67/x
3. Step 3: Cross multiply
   2,057.13x = 3,081.78 × 1,274.67
4. Step 4: Simplify right side
   2,057.13x = 3,928,252.51
5. Step 5: Solve for x
   x = 3,928,252.51/2,057.13
6. Step 6: Final answer
   x = 1,909.58