Finding the Fourth Proportional to 30,560.72, 45,782.52 and 20,682.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,560.72 : 45,782.52 = 20,682.96 : x
2. Step 2: Convert to fraction form
   30,560.72/45,782.52 = 20,682.96/x
3. Step 3: Cross multiply
   30,560.72x = 45,782.52 × 20,682.96
4. Step 4: Simplify right side
   30,560.72x = 946,918,029.86
5. Step 5: Solve for x
   x = 946,918,029.86/30,560.72
6. Step 6: Final answer
   x = 30,984.81