Finding the Fourth Proportional to 3,820.18, 5,729.19 and 1,222.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.18 : 5,729.19 = 1,222.78 : x
2. Step 2: Convert to fraction form
   3,820.18/5,729.19 = 1,222.78/x
3. Step 3: Cross multiply
   3,820.18x = 5,729.19 × 1,222.78
4. Step 4: Simplify right side
   3,820.18x = 7,005,538.95
5. Step 5: Solve for x
   x = 7,005,538.95/3,820.18
6. Step 6: Final answer
   x = 1,833.82