Finding the Fourth Proportional to 21,867.72, 30,174.57 and 12,308.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,867.72 : 30,174.57 = 12,308.10 : x
2. Step 2: Convert to fraction form
   21,867.72/30,174.57 = 12,308.10/x
3. Step 3: Cross multiply
   21,867.72x = 30,174.57 × 12,308.10
4. Step 4: Simplify right side
   21,867.72x = 371,391,625.02
5. Step 5: Solve for x
   x = 371,391,625.02/21,867.72
6. Step 6: Final answer
   x = 16,983.55