Finding the Fourth Proportional to 13,222.50, 18,247.05 and 7,633.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,222.50 : 18,247.05 = 7,633.50 : x
2. Step 2: Convert to fraction form
   13,222.50/18,247.05 = 7,633.50/x
3. Step 3: Cross multiply
   13,222.50x = 18,247.05 × 7,633.50
4. Step 4: Simplify right side
   13,222.50x = 139,288,856.18
5. Step 5: Solve for x
   x = 139,288,856.18/13,222.50
6. Step 6: Final answer
   x = 10,534.23