Finding the Fourth Proportional to 21,150.77, 29,191.12 and 12,196.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.77 : 29,191.12 = 12,196.49 : x
2. Step 2: Convert to fraction form
   21,150.77/29,191.12 = 12,196.49/x
3. Step 3: Cross multiply
   21,150.77x = 29,191.12 × 12,196.49
4. Step 4: Simplify right side
   21,150.77x = 356,029,026.72
5. Step 5: Solve for x
   x = 356,029,026.72/21,150.77
6. Step 6: Final answer
   x = 16,832.91