Finding the Fourth Proportional to 21,396.40, 32,067.86 and 10,300.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,396.40 : 32,067.86 = 10,300.12 : x
2. Step 2: Convert to fraction form
   21,396.40/32,067.86 = 10,300.12/x
3. Step 3: Cross multiply
   21,396.40x = 32,067.86 × 10,300.12
4. Step 4: Simplify right side
   21,396.40x = 330,302,751.72
5. Step 5: Solve for x
   x = 330,302,751.72/21,396.40
6. Step 6: Final answer
   x = 15,437.31