Finding the Third Proportional to 20,136.38 and 42,864.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,136.38 : 42,864.75 = 42,864.75 : x
2. Step 2: Convert to fraction form
   20,136.38/42,864.75 = 42,864.75/x
3. Step 3: Cross multiply
   20,136.38x = 42,864.75 × 42,864.75
4. Step 4: Simplify right side
   20,136.38x = 1,837,386,792.56
5. Step 5: Solve for x
   x = 1,837,386,792.56/20,136.38
6. Step 6: Final answer
   x = 91,247.15