Finding the Fourth Proportional to 12,172.35, 18,221.52 and 7,792.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.35 : 18,221.52 = 7,792.89 : x
2. Step 2: Convert to fraction form
   12,172.35/18,221.52 = 7,792.89/x
3. Step 3: Cross multiply
   12,172.35x = 18,221.52 × 7,792.89
4. Step 4: Simplify right side
   12,172.35x = 141,998,300.99
5. Step 5: Solve for x
   x = 141,998,300.99/12,172.35
6. Step 6: Final answer
   x = 11,665.64