Finding the Fourth Proportional to 21,148.84, 29,185 and 12,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,148.84 : 29,185 = 12,196.72 : x
2. Step 2: Convert to fraction form
   21,148.84/29,185 = 12,196.72/x
3. Step 3: Cross multiply
   21,148.84x = 29,185 × 12,196.72
4. Step 4: Simplify right side
   21,148.84x = 355,961,273.20
5. Step 5: Solve for x
   x = 355,961,273.20/21,148.84
6. Step 6: Final answer
   x = 16,831.24