Finding the Fourth Proportional to 21,119.01, 29,136.72 and 12,615.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,119.01 : 29,136.72 = 12,615.22 : x
2. Step 2: Convert to fraction form
   21,119.01/29,136.72 = 12,615.22/x
3. Step 3: Cross multiply
   21,119.01x = 29,136.72 × 12,615.22
4. Step 4: Simplify right side
   21,119.01x = 367,566,132.88
5. Step 5: Solve for x
   x = 367,566,132.88/21,119.01
6. Step 6: Final answer
   x = 17,404.52