Finding the Fourth Proportional to 21,151.33, 29,196.15 and 12,202.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,151.33 : 29,196.15 = 12,202.40 : x
2. Step 2: Convert to fraction form
   21,151.33/29,196.15 = 12,202.40/x
3. Step 3: Cross multiply
   21,151.33x = 29,196.15 × 12,202.40
4. Step 4: Simplify right side
   21,151.33x = 356,262,963.76
5. Step 5: Solve for x
   x = 356,262,963.76/21,151.33
6. Step 6: Final answer
   x = 16,843.53