Finding the Fourth Proportional to 13,216.50, 18,240.39 and 7,627.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,216.50 : 18,240.39 = 7,627.50 : x
2. Step 2: Convert to fraction form
   13,216.50/18,240.39 = 7,627.50/x
3. Step 3: Cross multiply
   13,216.50x = 18,240.39 × 7,627.50
4. Step 4: Simplify right side
   13,216.50x = 139,128,574.73
5. Step 5: Solve for x
   x = 139,128,574.73/13,216.50
6. Step 6: Final answer
   x = 10,526.88