Finding the Fourth Proportional to 21,793.78, 30,051.35 and 15,067.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,793.78 : 30,051.35 = 15,067.72 : x
2. Step 2: Convert to fraction form
   21,793.78/30,051.35 = 15,067.72/x
3. Step 3: Cross multiply
   21,793.78x = 30,051.35 × 15,067.72
4. Step 4: Simplify right side
   21,793.78x = 452,805,430.91
5. Step 5: Solve for x
   x = 452,805,430.91/21,793.78
6. Step 6: Final answer
   x = 20,776.82