Finding the Fourth Proportional to 21,738.06, 30,000.15 and 12,308.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,738.06 : 30,000.15 = 12,308.04 : x
2. Step 2: Convert to fraction form
   21,738.06/30,000.15 = 12,308.04/x
3. Step 3: Cross multiply
   21,738.06x = 30,000.15 × 12,308.04
4. Step 4: Simplify right side
   21,738.06x = 369,243,046.21
5. Step 5: Solve for x
   x = 369,243,046.21/21,738.06
6. Step 6: Final answer
   x = 16,986.02