Finding the Fourth Proportional to 2,012.56, 2,778.16 and 1,226.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.56 : 2,778.16 = 1,226.88 : x
2. Step 2: Convert to fraction form
   2,012.56/2,778.16 = 1,226.88/x
3. Step 3: Cross multiply
   2,012.56x = 2,778.16 × 1,226.88
4. Step 4: Simplify right side
   2,012.56x = 3,408,468.94
5. Step 5: Solve for x
   x = 3,408,468.94/2,012.56
6. Step 6: Final answer
   x = 1,693.60