Finding the Fourth Proportional to 3,820.96, 5,729.20 and 1,222.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.96 : 5,729.20 = 1,222.56 : x
2. Step 2: Convert to fraction form
   3,820.96/5,729.20 = 1,222.56/x
3. Step 3: Cross multiply
   3,820.96x = 5,729.20 × 1,222.56
4. Step 4: Simplify right side
   3,820.96x = 7,004,290.75
5. Step 5: Solve for x
   x = 7,004,290.75/3,820.96
6. Step 6: Final answer
   x = 1,833.12