Finding the Fourth Proportional to 21,459.98, 29,613.17 and 12,026.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,459.98 : 29,613.17 = 12,026.72 : x
2. Step 2: Convert to fraction form
   21,459.98/29,613.17 = 12,026.72/x
3. Step 3: Cross multiply
   21,459.98x = 29,613.17 × 12,026.72
4. Step 4: Simplify right side
   21,459.98x = 356,149,317.80
5. Step 5: Solve for x
   x = 356,149,317.80/21,459.98
6. Step 6: Final answer
   x = 16,595.97