Finding the Fourth Proportional to 21,152.89, 29,194.05 and 12,198.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.89 : 29,194.05 = 12,198.61 : x
2. Step 2: Convert to fraction form
   21,152.89/29,194.05 = 12,198.61/x
3. Step 3: Cross multiply
   21,152.89x = 29,194.05 × 12,198.61
4. Step 4: Simplify right side
   21,152.89x = 356,126,830.27
5. Step 5: Solve for x
   x = 356,126,830.27/21,152.89
6. Step 6: Final answer
   x = 16,835.85