Finding the Fourth Proportional to 21,114.78, 29,133.42 and 12,615.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,114.78 : 29,133.42 = 12,615.24 : x
2. Step 2: Convert to fraction form
   21,114.78/29,133.42 = 12,615.24/x
3. Step 3: Cross multiply
   21,114.78x = 29,133.42 × 12,615.24
4. Step 4: Simplify right side
   21,114.78x = 367,525,085.32
5. Step 5: Solve for x
   x = 367,525,085.32/21,114.78
6. Step 6: Final answer
   x = 17,406.06