Finding the Fourth Proportional to 21,597.86, 32,396.78 and 12,357.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,597.86 : 32,396.78 = 12,357.38 : x
2. Step 2: Convert to fraction form
   21,597.86/32,396.78 = 12,357.38/x
3. Step 3: Cross multiply
   21,597.86x = 32,396.78 × 12,357.38
4. Step 4: Simplify right side
   21,597.86x = 400,339,321.24
5. Step 5: Solve for x
   x = 400,339,321.24/21,597.86
6. Step 6: Final answer
   x = 18,536.06