Finding the Fourth Proportional to 2,012.96, 2,778.48 and 1,227.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.96 : 2,778.48 = 1,227.39 : x
2. Step 2: Convert to fraction form
   2,012.96/2,778.48 = 1,227.39/x
3. Step 3: Cross multiply
   2,012.96x = 2,778.48 × 1,227.39
4. Step 4: Simplify right side
   2,012.96x = 3,410,278.57
5. Step 5: Solve for x
   x = 3,410,278.57/2,012.96
6. Step 6: Final answer
   x = 1,694.17