Finding the Fourth Proportional to 22,168.54, 30,596.39 and 21,172.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,168.54 : 30,596.39 = 21,172.06 : x
2. Step 2: Convert to fraction form
   22,168.54/30,596.39 = 21,172.06/x
3. Step 3: Cross multiply
   22,168.54x = 30,596.39 × 21,172.06
4. Step 4: Simplify right side
   22,168.54x = 647,788,604.86
5. Step 5: Solve for x
   x = 647,788,604.86/22,168.54
6. Step 6: Final answer
   x = 29,221.08