Finding the Fourth Proportional to 21,753.20, 30,019.39 and 12,323.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,753.20 : 30,019.39 = 12,323.58 : x
2. Step 2: Convert to fraction form
   21,753.20/30,019.39 = 12,323.58/x
3. Step 3: Cross multiply
   21,753.20x = 30,019.39 × 12,323.58
4. Step 4: Simplify right side
   21,753.20x = 369,946,354.22
5. Step 5: Solve for x
   x = 369,946,354.22/21,753.20
6. Step 6: Final answer
   x = 17,006.53