Finding the Fourth Proportional to 3,848.72, 5,771.78 and 1,216.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,848.72 : 5,771.78 = 1,216.20 : x
2. Step 2: Convert to fraction form
   3,848.72/5,771.78 = 1,216.20/x
3. Step 3: Cross multiply
   3,848.72x = 5,771.78 × 1,216.20
4. Step 4: Simplify right side
   3,848.72x = 7,019,638.84
5. Step 5: Solve for x
   x = 7,019,638.84/3,848.72
6. Step 6: Final answer
   x = 1,823.89