Finding the Fourth Proportional to 21,406.37, 29,550.71 and 12,450.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,406.37 : 29,550.71 = 12,450.61 : x
2. Step 2: Convert to fraction form
   21,406.37/29,550.71 = 12,450.61/x
3. Step 3: Cross multiply
   21,406.37x = 29,550.71 × 12,450.61
4. Step 4: Simplify right side
   21,406.37x = 367,924,155.43
5. Step 5: Solve for x
   x = 367,924,155.43/21,406.37
6. Step 6: Final answer
   x = 17,187.60