Finding the Third Proportional to 20,424.23 and 42,719.06

Step by Step Solution

1. Step 1: Write the proportion equation
   20,424.23 : 42,719.06 = 42,719.06 : x
2. Step 2: Convert to fraction form
   20,424.23/42,719.06 = 42,719.06/x
3. Step 3: Cross multiply
   20,424.23x = 42,719.06 × 42,719.06
4. Step 4: Simplify right side
   20,424.23x = 1,824,918,300.88
5. Step 5: Solve for x
   x = 1,824,918,300.88/20,424.23
6. Step 6: Final answer
   x = 89,350.63