Finding the Fourth Proportional to 3,638.17, 5,019.43 and 2,221.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.17 : 5,019.43 = 2,221.48 : x
2. Step 2: Convert to fraction form
   3,638.17/5,019.43 = 2,221.48/x
3. Step 3: Cross multiply
   3,638.17x = 5,019.43 × 2,221.48
4. Step 4: Simplify right side
   3,638.17x = 11,150,552.25
5. Step 5: Solve for x
   x = 11,150,552.25/3,638.17
6. Step 6: Final answer
   x = 3,064.88