Finding the Third Proportional to 20,215.13 and 42,981.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,215.13 : 42,981.75 = 42,981.75 : x
2. Step 2: Convert to fraction form
   20,215.13/42,981.75 = 42,981.75/x
3. Step 3: Cross multiply
   20,215.13x = 42,981.75 × 42,981.75
4. Step 4: Simplify right side
   20,215.13x = 1,847,430,833.06
5. Step 5: Solve for x
   x = 1,847,430,833.06/20,215.13
6. Step 6: Final answer
   x = 91,388.54