Finding the Fourth Proportional to 2,002.22, 2,763.24 and 1,216.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.22 : 2,763.24 = 1,216.70 : x
2. Step 2: Convert to fraction form
   2,002.22/2,763.24 = 1,216.70/x
3. Step 3: Cross multiply
   2,002.22x = 2,763.24 × 1,216.70
4. Step 4: Simplify right side
   2,002.22x = 3,362,034.11
5. Step 5: Solve for x
   x = 3,362,034.11/2,002.22
6. Step 6: Final answer
   x = 1,679.15