Finding the Fourth Proportional to 2,212, 3,052.72 and 1,280.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212 : 3,052.72 = 1,280.56 : x
2. Step 2: Convert to fraction form
   2,212/3,052.72 = 1,280.56/x
3. Step 3: Cross multiply
   2,212x = 3,052.72 × 1,280.56
4. Step 4: Simplify right side
   2,212x = 3,909,191.12
5. Step 5: Solve for x
   x = 3,909,191.12/2,212
6. Step 6: Final answer
   x = 1,767.27