Finding the Third Proportional to 39,728.50 and 58,905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,728.50 : 58,905.50 = 58,905.50 : x
2. Step 2: Convert to fraction form
   39,728.50/58,905.50 = 58,905.50/x
3. Step 3: Cross multiply
   39,728.50x = 58,905.50 × 58,905.50
4. Step 4: Simplify right side
   39,728.50x = 3,469,857,930.25
5. Step 5: Solve for x
   x = 3,469,857,930.25/39,728.50
6. Step 6: Final answer
   x = 87,339.26