Finding the Fourth Proportional to 31,789.39, 47,667.60 and 13,065.97

Step by Step Solution

1. Step 1: Write the proportion equation
   31,789.39 : 47,667.60 = 13,065.97 : x
2. Step 2: Convert to fraction form
   31,789.39/47,667.60 = 13,065.97/x
3. Step 3: Cross multiply
   31,789.39x = 47,667.60 × 13,065.97
4. Step 4: Simplify right side
   31,789.39x = 622,823,431.57
5. Step 5: Solve for x
   x = 622,823,431.57/31,789.39
6. Step 6: Final answer
   x = 19,592.18