Finding the Fourth Proportional to 30,714.96, 42,399.72 and 20,649.24

Step by Step Solution

1. Step 1: Write the proportion equation
   30,714.96 : 42,399.72 = 20,649.24 : x
2. Step 2: Convert to fraction form
   30,714.96/42,399.72 = 20,649.24/x
3. Step 3: Cross multiply
   30,714.96x = 42,399.72 × 20,649.24
4. Step 4: Simplify right side
   30,714.96x = 875,521,757.78
5. Step 5: Solve for x
   x = 875,521,757.78/30,714.96
6. Step 6: Final answer
   x = 28,504.74