Finding the Fourth Proportional to 7,212.72, 10,822.72 and 3,316.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,212.72 : 10,822.72 = 3,316.62 : x
2. Step 2: Convert to fraction form
   7,212.72/10,822.72 = 3,316.62/x
3. Step 3: Cross multiply
   7,212.72x = 10,822.72 × 3,316.62
4. Step 4: Simplify right side
   7,212.72x = 35,894,849.61
5. Step 5: Solve for x
   x = 35,894,849.61/7,212.72
6. Step 6: Final answer
   x = 4,976.60