Finding the Fourth Proportional to 3,818.98, 5,729.42 and 1,221.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818.98 : 5,729.42 = 1,221.92 : x
2. Step 2: Convert to fraction form
   3,818.98/5,729.42 = 1,221.92/x
3. Step 3: Cross multiply
   3,818.98x = 5,729.42 × 1,221.92
4. Step 4: Simplify right side
   3,818.98x = 7,000,892.89
5. Step 5: Solve for x
   x = 7,000,892.89/3,818.98
6. Step 6: Final answer
   x = 1,833.18