Finding the Fourth Proportional to 21,150.12, 29,190.78 and 12,196.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.12 : 29,190.78 = 12,196.02 : x
2. Step 2: Convert to fraction form
   21,150.12/29,190.78 = 12,196.02/x
3. Step 3: Cross multiply
   21,150.12x = 29,190.78 × 12,196.02
4. Step 4: Simplify right side
   21,150.12x = 356,011,336.70
5. Step 5: Solve for x
   x = 356,011,336.70/21,150.12
6. Step 6: Final answer
   x = 16,832.59