Finding the Fourth Proportional to 21,065.36, 29,067.72 and 12,567.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,065.36 : 29,067.72 = 12,567.98 : x
2. Step 2: Convert to fraction form
   21,065.36/29,067.72 = 12,567.98/x
3. Step 3: Cross multiply
   21,065.36x = 29,067.72 × 12,567.98
4. Step 4: Simplify right side
   21,065.36x = 365,322,523.61
5. Step 5: Solve for x
   x = 365,322,523.61/21,065.36
6. Step 6: Final answer
   x = 17,342.33