Finding the Fourth Proportional to 2,016.29, 2,778.55 and 1,425.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.29 : 2,778.55 = 1,425.80 : x
2. Step 2: Convert to fraction form
   2,016.29/2,778.55 = 1,425.80/x
3. Step 3: Cross multiply
   2,016.29x = 2,778.55 × 1,425.80
4. Step 4: Simplify right side
   2,016.29x = 3,961,667.99
5. Step 5: Solve for x
   x = 3,961,667.99/2,016.29
6. Step 6: Final answer
   x = 1,964.83