Finding the Third Proportional to 20,128.50 and 41,310

Step by Step Solution

1. Step 1: Write the proportion equation
   20,128.50 : 41,310 = 41,310 : x
2. Step 2: Convert to fraction form
   20,128.50/41,310 = 41,310/x
3. Step 3: Cross multiply
   20,128.50x = 41,310 × 41,310
4. Step 4: Simplify right side
   20,128.50x = 1,706,516,100
5. Step 5: Solve for x
   x = 1,706,516,100/20,128.50
6. Step 6: Final answer
   x = 84,781.09