Finding the Fourth Proportional to 21,062.39, 29,066.04 and 12,109.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062.39 : 29,066.04 = 12,109.46 : x
2. Step 2: Convert to fraction form
   21,062.39/29,066.04 = 12,109.46/x
3. Step 3: Cross multiply
   21,062.39x = 29,066.04 × 12,109.46
4. Step 4: Simplify right side
   21,062.39x = 351,973,903.41
5. Step 5: Solve for x
   x = 351,973,903.41/21,062.39
6. Step 6: Final answer
   x = 16,711.02