Finding the Fourth Proportional to 21,111.24, 29,133.96 and 12,622.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.24 : 29,133.96 = 12,622.14 : x
2. Step 2: Convert to fraction form
   21,111.24/29,133.96 = 12,622.14/x
3. Step 3: Cross multiply
   21,111.24x = 29,133.96 × 12,622.14
4. Step 4: Simplify right side
   21,111.24x = 367,732,921.87
5. Step 5: Solve for x
   x = 367,732,921.87/21,111.24
6. Step 6: Final answer
   x = 17,418.82