Finding the Fourth Proportional to 21,066.89, 29,071.79 and 12,114.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.89 : 29,071.79 = 12,114.19 : x
2. Step 2: Convert to fraction form
   21,066.89/29,071.79 = 12,114.19/x
3. Step 3: Cross multiply
   21,066.89x = 29,071.79 × 12,114.19
4. Step 4: Simplify right side
   21,066.89x = 352,181,113.51
5. Step 5: Solve for x
   x = 352,181,113.51/21,066.89
6. Step 6: Final answer
   x = 16,717.28