Finding the Fourth Proportional to 12,172.48, 18,221.72 and 7,793.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.48 : 18,221.72 = 7,793.01 : x
2. Step 2: Convert to fraction form
   12,172.48/18,221.72 = 7,793.01/x
3. Step 3: Cross multiply
   12,172.48x = 18,221.72 × 7,793.01
4. Step 4: Simplify right side
   12,172.48x = 142,002,007.21
5. Step 5: Solve for x
   x = 142,002,007.21/12,172.48
6. Step 6: Final answer
   x = 11,665.83