Finding the Fourth Proportional to 21,404.32, 29,535.64 and 12,453.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,404.32 : 29,535.64 = 12,453.62 : x
2. Step 2: Convert to fraction form
   21,404.32/29,535.64 = 12,453.62/x
3. Step 3: Cross multiply
   21,404.32x = 29,535.64 × 12,453.62
4. Step 4: Simplify right side
   21,404.32x = 367,825,458.20
5. Step 5: Solve for x
   x = 367,825,458.20/21,404.32
6. Step 6: Final answer
   x = 17,184.64