Finding the Fourth Proportional to 2,002.68, 2,764.16 and 1,216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.68 : 2,764.16 = 1,216.56 : x
2. Step 2: Convert to fraction form
   2,002.68/2,764.16 = 1,216.56/x
3. Step 3: Cross multiply
   2,002.68x = 2,764.16 × 1,216.56
4. Step 4: Simplify right side
   2,002.68x = 3,362,766.49
5. Step 5: Solve for x
   x = 3,362,766.49/2,002.68
6. Step 6: Final answer
   x = 1,679.13