Finding the Fourth Proportional to 21,308.29, 29,408.27 and 12,237.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,308.29 : 29,408.27 = 12,237.23 : x
2. Step 2: Convert to fraction form
   21,308.29/29,408.27 = 12,237.23/x
3. Step 3: Cross multiply
   21,308.29x = 29,408.27 × 12,237.23
4. Step 4: Simplify right side
   21,308.29x = 359,875,776.23
5. Step 5: Solve for x
   x = 359,875,776.23/21,308.29
6. Step 6: Final answer
   x = 16,889.01