Finding the Third Proportional to 20,160 and 30,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,160 : 30,685.50 = 30,685.50 : x
2. Step 2: Convert to fraction form
   20,160/30,685.50 = 30,685.50/x
3. Step 3: Cross multiply
   20,160x = 30,685.50 × 30,685.50
4. Step 4: Simplify right side
   20,160x = 941,599,910.25
5. Step 5: Solve for x
   x = 941,599,910.25/20,160
6. Step 6: Final answer
   x = 46,706.34