Finding the Fourth Proportional to 21,023.22, 31,491.72 and 16,840.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,023.22 : 31,491.72 = 16,840.56 : x
2. Step 2: Convert to fraction form
   21,023.22/31,491.72 = 16,840.56/x
3. Step 3: Cross multiply
   21,023.22x = 31,491.72 × 16,840.56
4. Step 4: Simplify right side
   21,023.22x = 530,338,200.16
5. Step 5: Solve for x
   x = 530,338,200.16/21,023.22
6. Step 6: Final answer
   x = 25,226.31