Finding the Fourth Proportional to 47,109.72, 65,029.92 and 28,243.20

Step by Step Solution

1. Step 1: Write the proportion equation
   47,109.72 : 65,029.92 = 28,243.20 : x
2. Step 2: Convert to fraction form
   47,109.72/65,029.92 = 28,243.20/x
3. Step 3: Cross multiply
   47,109.72x = 65,029.92 × 28,243.20
4. Step 4: Simplify right side
   47,109.72x = 1,836,653,036.54
5. Step 5: Solve for x
   x = 1,836,653,036.54/47,109.72
6. Step 6: Final answer
   x = 38,986.71