Finding the Fourth Proportional to 21,301.56, 29,397.06 and 12,351.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,301.56 : 29,397.06 = 12,351.06 : x
2. Step 2: Convert to fraction form
   21,301.56/29,397.06 = 12,351.06/x
3. Step 3: Cross multiply
   21,301.56x = 29,397.06 × 12,351.06
4. Step 4: Simplify right side
   21,301.56x = 363,084,851.88
5. Step 5: Solve for x
   x = 363,084,851.88/21,301.56
6. Step 6: Final answer
   x = 17,044.99