Finding the Fourth Proportional to 13,219.50, 18,243.63 and 7,632.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,219.50 : 18,243.63 = 7,632.30 : x
2. Step 2: Convert to fraction form
   13,219.50/18,243.63 = 7,632.30/x
3. Step 3: Cross multiply
   13,219.50x = 18,243.63 × 7,632.30
4. Step 4: Simplify right side
   13,219.50x = 139,240,857.25
5. Step 5: Solve for x
   x = 139,240,857.25/13,219.50
6. Step 6: Final answer
   x = 10,532.99