Finding the Third Proportional to 39,904.50 and 81,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,904.50 : 81,631.50 = 81,631.50 : x
2. Step 2: Convert to fraction form
   39,904.50/81,631.50 = 81,631.50/x
3. Step 3: Cross multiply
   39,904.50x = 81,631.50 × 81,631.50
4. Step 4: Simplify right side
   39,904.50x = 6,663,701,792.25
5. Step 5: Solve for x
   x = 6,663,701,792.25/39,904.50
6. Step 6: Final answer
   x = 166,991.24