Finding the Third Proportional to 20,819 and 43,258

Step by Step Solution

1. Step 1: Write the proportion equation
   20,819 : 43,258 = 43,258 : x
2. Step 2: Convert to fraction form
   20,819/43,258 = 43,258/x
3. Step 3: Cross multiply
   20,819x = 43,258 × 43,258
4. Step 4: Simplify right side
   20,819x = 1,871,254,564
5. Step 5: Solve for x
   x = 1,871,254,564/20,819
6. Step 6: Final answer
   x = 89,882.06