Finding the Fourth Proportional to 21,025.22, 31,494.72 and 16,842.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,025.22 : 31,494.72 = 16,842.56 : x
2. Step 2: Convert to fraction form
   21,025.22/31,494.72 = 16,842.56/x
3. Step 3: Cross multiply
   21,025.22x = 31,494.72 × 16,842.56
4. Step 4: Simplify right side
   21,025.22x = 530,451,711.28
5. Step 5: Solve for x
   x = 530,451,711.28/21,025.22
6. Step 6: Final answer
   x = 25,229.31