Finding the Fourth Proportional to 21,438.42, 32,151.15 and 10,338.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,438.42 : 32,151.15 = 10,338.18 : x
2. Step 2: Convert to fraction form
   21,438.42/32,151.15 = 10,338.18/x
3. Step 3: Cross multiply
   21,438.42x = 32,151.15 × 10,338.18
4. Step 4: Simplify right side
   21,438.42x = 332,384,375.91
5. Step 5: Solve for x
   x = 332,384,375.91/21,438.42
6. Step 6: Final answer
   x = 15,504.15