Finding the Fourth Proportional to 8,819.40, 13,224.43 and 3,886.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.40 : 13,224.43 = 3,886.72 : x
2. Step 2: Convert to fraction form
   8,819.40/13,224.43 = 3,886.72/x
3. Step 3: Cross multiply
   8,819.40x = 13,224.43 × 3,886.72
4. Step 4: Simplify right side
   8,819.40x = 51,399,656.57
5. Step 5: Solve for x
   x = 51,399,656.57/8,819.40
6. Step 6: Final answer
   x = 5,828.02