Finding the Fourth Proportional to 31,785.59, 43,864.05 and 17,638.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,785.59 : 43,864.05 = 17,638.40 : x
2. Step 2: Convert to fraction form
   31,785.59/43,864.05 = 17,638.40/x
3. Step 3: Cross multiply
   31,785.59x = 43,864.05 × 17,638.40
4. Step 4: Simplify right side
   31,785.59x = 773,691,659.52
5. Step 5: Solve for x
   x = 773,691,659.52/31,785.59
6. Step 6: Final answer
   x = 24,340.96