Finding the Fourth Proportional to 39,441.29, 54,429.89 and 21,536.42

Step by Step Solution

1. Step 1: Write the proportion equation
   39,441.29 : 54,429.89 = 21,536.42 : x
2. Step 2: Convert to fraction form
   39,441.29/54,429.89 = 21,536.42/x
3. Step 3: Cross multiply
   39,441.29x = 54,429.89 × 21,536.42
4. Step 4: Simplify right side
   39,441.29x = 1,172,224,591.76
5. Step 5: Solve for x
   x = 1,172,224,591.76/39,441.29
6. Step 6: Final answer
   x = 29,720.75