Finding the Fourth Proportional to 21,066.84, 29,073.60 and 12,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.84 : 29,073.60 = 12,114.72 : x
2. Step 2: Convert to fraction form
   21,066.84/29,073.60 = 12,114.72/x
3. Step 3: Cross multiply
   21,066.84x = 29,073.60 × 12,114.72
4. Step 4: Simplify right side
   21,066.84x = 352,218,523.39
5. Step 5: Solve for x
   x = 352,218,523.39/21,066.84
6. Step 6: Final answer
   x = 16,719.10