Finding the Fourth Proportional to 21,066.32, 29,073.06 and 12,116.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.32 : 29,073.06 = 12,116.63 : x
2. Step 2: Convert to fraction form
   21,066.32/29,073.06 = 12,116.63/x
3. Step 3: Cross multiply
   21,066.32x = 29,073.06 × 12,116.63
4. Step 4: Simplify right side
   21,066.32x = 352,267,450.40
5. Step 5: Solve for x
   x = 352,267,450.40/21,066.32
6. Step 6: Final answer
   x = 16,721.83