Finding the Third Proportional to 39,385.50 and 86,424.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,385.50 : 86,424.88 = 86,424.88 : x
2. Step 2: Convert to fraction form
   39,385.50/86,424.88 = 86,424.88/x
3. Step 3: Cross multiply
   39,385.50x = 86,424.88 × 86,424.88
4. Step 4: Simplify right side
   39,385.50x = 7,469,259,018.77
5. Step 5: Solve for x
   x = 7,469,259,018.77/39,385.50
6. Step 6: Final answer
   x = 189,644.90