Finding the Third Proportional to 3,928.50 and 7,970.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.50 : 7,970.91 = 7,970.91 : x
2. Step 2: Convert to fraction form
   3,928.50/7,970.91 = 7,970.91/x
3. Step 3: Cross multiply
   3,928.50x = 7,970.91 × 7,970.91
4. Step 4: Simplify right side
   3,928.50x = 63,535,346.45
5. Step 5: Solve for x
   x = 63,535,346.45/3,928.50
6. Step 6: Final answer
   x = 16,172.93