Finding the Fourth Proportional to 21,717.59, 29,956.61 and 16,674.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,717.59 : 29,956.61 = 16,674.12 : x
2. Step 2: Convert to fraction form
   21,717.59/29,956.61 = 16,674.12/x
3. Step 3: Cross multiply
   21,717.59x = 29,956.61 × 16,674.12
4. Step 4: Simplify right side
   21,717.59x = 499,500,026.56
5. Step 5: Solve for x
   x = 499,500,026.56/21,717.59
6. Step 6: Final answer
   x = 22,999.80