Finding the Fourth Proportional to 31,789.72, 47,682.46 and 13,064.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,789.72 : 47,682.46 = 13,064.91 : x
2. Step 2: Convert to fraction form
   31,789.72/47,682.46 = 13,064.91/x
3. Step 3: Cross multiply
   31,789.72x = 47,682.46 × 13,064.91
4. Step 4: Simplify right side
   31,789.72x = 622,967,048.48
5. Step 5: Solve for x
   x = 622,967,048.48/31,789.72
6. Step 6: Final answer
   x = 19,596.49