Finding the Fourth Proportional to 31,785.86, 43,865.82 and 17,638.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,785.86 : 43,865.82 = 17,638.71 : x
2. Step 2: Convert to fraction form
   31,785.86/43,865.82 = 17,638.71/x
3. Step 3: Cross multiply
   31,785.86x = 43,865.82 × 17,638.71
4. Step 4: Simplify right side
   31,785.86x = 773,736,477.89
5. Step 5: Solve for x
   x = 773,736,477.89/31,785.86
6. Step 6: Final answer
   x = 24,342.16