Finding the Fourth Proportional to 39,651.82, 54,719.46 and 21,747.12

Step by Step Solution

1. Step 1: Write the proportion equation
   39,651.82 : 54,719.46 = 21,747.12 : x
2. Step 2: Convert to fraction form
   39,651.82/54,719.46 = 21,747.12/x
3. Step 3: Cross multiply
   39,651.82x = 54,719.46 × 21,747.12
4. Step 4: Simplify right side
   39,651.82x = 1,189,990,662.96
5. Step 5: Solve for x
   x = 1,189,990,662.96/39,651.82
6. Step 6: Final answer
   x = 30,011.00