Finding the Fourth Proportional to 21,498.24, 29,664.96 and 12,064.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.24 : 29,664.96 = 12,064.80 : x
2. Step 2: Convert to fraction form
   21,498.24/29,664.96 = 12,064.80/x
3. Step 3: Cross multiply
   21,498.24x = 29,664.96 × 12,064.80
4. Step 4: Simplify right side
   21,498.24x = 357,901,809.41
5. Step 5: Solve for x
   x = 357,901,809.41/21,498.24
6. Step 6: Final answer
   x = 16,647.96