Finding the Third Proportional to 20,870 and 45,719

Step by Step Solution

1. Step 1: Write the proportion equation
   20,870 : 45,719 = 45,719 : x
2. Step 2: Convert to fraction form
   20,870/45,719 = 45,719/x
3. Step 3: Cross multiply
   20,870x = 45,719 × 45,719
4. Step 4: Simplify right side
   20,870x = 2,090,226,961
5. Step 5: Solve for x
   x = 2,090,226,961/20,870
6. Step 6: Final answer
   x = 100,154.62