Finding the Third Proportional to 39,385.38 and 86,424.63

Step by Step Solution

1. Step 1: Write the proportion equation
   39,385.38 : 86,424.63 = 86,424.63 : x
2. Step 2: Convert to fraction form
   39,385.38/86,424.63 = 86,424.63/x
3. Step 3: Cross multiply
   39,385.38x = 86,424.63 × 86,424.63
4. Step 4: Simplify right side
   39,385.38x = 7,469,215,806.39
5. Step 5: Solve for x
   x = 7,469,215,806.39/39,385.38
6. Step 6: Final answer
   x = 189,644.40