Finding the Fourth Proportional to 38,454.38, 53,067.04 and 21,687.38

Step by Step Solution

1. Step 1: Write the proportion equation
   38,454.38 : 53,067.04 = 21,687.38 : x
2. Step 2: Convert to fraction form
   38,454.38/53,067.04 = 21,687.38/x
3. Step 3: Cross multiply
   38,454.38x = 53,067.04 × 21,687.38
4. Step 4: Simplify right side
   38,454.38x = 1,150,885,061.96
5. Step 5: Solve for x
   x = 1,150,885,061.96/38,454.38
6. Step 6: Final answer
   x = 29,928.58