Finding the Fourth Proportional to 31,920.24, 43,864.89 and 30,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,920.24 : 43,864.89 = 30,456.72 : x
2. Step 2: Convert to fraction form
   31,920.24/43,864.89 = 30,456.72/x
3. Step 3: Cross multiply
   31,920.24x = 43,864.89 × 30,456.72
4. Step 4: Simplify right side
   31,920.24x = 1,335,980,672.56
5. Step 5: Solve for x
   x = 1,335,980,672.56/31,920.24
6. Step 6: Final answer
   x = 41,853.72