Finding the Fourth Proportional to 8,819.91, 13,212.59 and 5,114.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.91 : 13,212.59 = 5,114.39 : x
2. Step 2: Convert to fraction form
   8,819.91/13,212.59 = 5,114.39/x
3. Step 3: Cross multiply
   8,819.91x = 13,212.59 × 5,114.39
4. Step 4: Simplify right side
   8,819.91x = 67,574,246.54
5. Step 5: Solve for x
   x = 67,574,246.54/8,819.91
6. Step 6: Final answer
   x = 7,661.56