Finding the Fourth Proportional to 21,622.02, 29,836.89 and 12,188.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,622.02 : 29,836.89 = 12,188.58 : x
2. Step 2: Convert to fraction form
   21,622.02/29,836.89 = 12,188.58/x
3. Step 3: Cross multiply
   21,622.02x = 29,836.89 × 12,188.58
4. Step 4: Simplify right side
   21,622.02x = 363,669,320.72
5. Step 5: Solve for x
   x = 363,669,320.72/21,622.02
6. Step 6: Final answer
   x = 16,819.40