Finding the Fourth Proportional to 21,150.84, 29,187.76 and 12,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.84 : 29,187.76 = 12,198.72 : x
2. Step 2: Convert to fraction form
   21,150.84/29,187.76 = 12,198.72/x
3. Step 3: Cross multiply
   21,150.84x = 29,187.76 × 12,198.72
4. Step 4: Simplify right side
   21,150.84x = 356,053,311.67
5. Step 5: Solve for x
   x = 356,053,311.67/21,150.84
6. Step 6: Final answer
   x = 16,834.00