Finding the Fourth Proportional to 21,666.69, 29,900.24 and 12,714.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,666.69 : 29,900.24 = 12,714.35 : x
2. Step 2: Convert to fraction form
   21,666.69/29,900.24 = 12,714.35/x
3. Step 3: Cross multiply
   21,666.69x = 29,900.24 × 12,714.35
4. Step 4: Simplify right side
   21,666.69x = 380,161,903.37
5. Step 5: Solve for x
   x = 380,161,903.37/21,666.69
6. Step 6: Final answer
   x = 17,545.92