Finding the Third Proportional to 20,426.63 and 42,724.13

Step by Step Solution

1. Step 1: Write the proportion equation
   20,426.63 : 42,724.13 = 42,724.13 : x
2. Step 2: Convert to fraction form
   20,426.63/42,724.13 = 42,724.13/x
3. Step 3: Cross multiply
   20,426.63x = 42,724.13 × 42,724.13
4. Step 4: Simplify right side
   20,426.63x = 1,825,350,857.02
5. Step 5: Solve for x
   x = 1,825,350,857.02/20,426.63
6. Step 6: Final answer
   x = 89,361.35