Finding the Third Proportional to 30,243 and 64,869

Step by Step Solution

1. Step 1: Write the proportion equation
   30,243 : 64,869 = 64,869 : x
2. Step 2: Convert to fraction form
   30,243/64,869 = 64,869/x
3. Step 3: Cross multiply
   30,243x = 64,869 × 64,869
4. Step 4: Simplify right side
   30,243x = 4,207,987,161
5. Step 5: Solve for x
   x = 4,207,987,161/30,243
6. Step 6: Final answer
   x = 139,139.21