Finding the Third Proportional to 30,124 and 64,905

Step by Step Solution

1. Step 1: Write the proportion equation
   30,124 : 64,905 = 64,905 : x
2. Step 2: Convert to fraction form
   30,124/64,905 = 64,905/x
3. Step 3: Cross multiply
   30,124x = 64,905 × 64,905
4. Step 4: Simplify right side
   30,124x = 4,212,659,025
5. Step 5: Solve for x
   x = 4,212,659,025/30,124
6. Step 6: Final answer
   x = 139,843.95