Finding the Fourth Proportional to 3,638.43, 5,019.77 and 2,221.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.43 : 5,019.77 = 2,221.74 : x
2. Step 2: Convert to fraction form
   3,638.43/5,019.77 = 2,221.74/x
3. Step 3: Cross multiply
   3,638.43x = 5,019.77 × 2,221.74
4. Step 4: Simplify right side
   3,638.43x = 11,152,612.69
5. Step 5: Solve for x
   x = 11,152,612.69/3,638.43
6. Step 6: Final answer
   x = 3,065.23