Finding the Fourth Proportional to 7,222.50, 10,838.10 and 3,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,222.50 : 10,838.10 = 3,118.50 : x
2. Step 2: Convert to fraction form
   7,222.50/10,838.10 = 3,118.50/x
3. Step 3: Cross multiply
   7,222.50x = 10,838.10 × 3,118.50
4. Step 4: Simplify right side
   7,222.50x = 33,798,614.85
5. Step 5: Solve for x
   x = 33,798,614.85/7,222.50
6. Step 6: Final answer
   x = 4,679.63