Finding the Fourth Proportional to 3,872.22, 5,347.35 and 3,864.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.22 : 5,347.35 = 3,864.30 : x
2. Step 2: Convert to fraction form
   3,872.22/5,347.35 = 3,864.30/x
3. Step 3: Cross multiply
   3,872.22x = 5,347.35 × 3,864.30
4. Step 4: Simplify right side
   3,872.22x = 20,663,764.61
5. Step 5: Solve for x
   x = 20,663,764.61/3,872.22
6. Step 6: Final answer
   x = 5,336.41