Finding the Third Proportional to 66,989.50 and 103,680

Step by Step Solution

1. Step 1: Write the proportion equation
   66,989.50 : 103,680 = 103,680 : x
2. Step 2: Convert to fraction form
   66,989.50/103,680 = 103,680/x
3. Step 3: Cross multiply
   66,989.50x = 103,680 × 103,680
4. Step 4: Simplify right side
   66,989.50x = 10,749,542,400
5. Step 5: Solve for x
   x = 10,749,542,400/66,989.50
6. Step 6: Final answer
   x = 160,466.08