Finding the Fourth Proportional to 3,681.21, 5,522.78 and 2,229.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.21 : 5,522.78 = 2,229.69 : x
2. Step 2: Convert to fraction form
   3,681.21/5,522.78 = 2,229.69/x
3. Step 3: Cross multiply
   3,681.21x = 5,522.78 × 2,229.69
4. Step 4: Simplify right side
   3,681.21x = 12,314,076.19
5. Step 5: Solve for x
   x = 12,314,076.19/3,681.21
6. Step 6: Final answer
   x = 3,345.12