Finding the Fourth Proportional to 7,212.38, 10,819.89 and 3,316.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,212.38 : 10,819.89 = 3,316.69 : x
2. Step 2: Convert to fraction form
   7,212.38/10,819.89 = 3,316.69/x
3. Step 3: Cross multiply
   7,212.38x = 10,819.89 × 3,316.69
4. Step 4: Simplify right side
   7,212.38x = 35,886,193.91
5. Step 5: Solve for x
   x = 35,886,193.91/7,212.38
6. Step 6: Final answer
   x = 4,975.64