Finding the Fourth Proportional to 2,219.15, 3,062.31 and 1,224.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.15 : 3,062.31 = 1,224.24 : x
2. Step 2: Convert to fraction form
   2,219.15/3,062.31 = 1,224.24/x
3. Step 3: Cross multiply
   2,219.15x = 3,062.31 × 1,224.24
4. Step 4: Simplify right side
   2,219.15x = 3,749,002.39
5. Step 5: Solve for x
   x = 3,749,002.39/2,219.15
6. Step 6: Final answer
   x = 1,689.39