Finding the Fourth Proportional to 21,401.54, 29,536.33 and 12,327.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.54 : 29,536.33 = 12,327.20 : x
2. Step 2: Convert to fraction form
   21,401.54/29,536.33 = 12,327.20/x
3. Step 3: Cross multiply
   21,401.54x = 29,536.33 × 12,327.20
4. Step 4: Simplify right side
   21,401.54x = 364,100,068.68
5. Step 5: Solve for x
   x = 364,100,068.68/21,401.54
6. Step 6: Final answer
   x = 17,012.80