Finding the Third Proportional to 30,456 and 64,245

Step by Step Solution

1. Step 1: Write the proportion equation
   30,456 : 64,245 = 64,245 : x
2. Step 2: Convert to fraction form
   30,456/64,245 = 64,245/x
3. Step 3: Cross multiply
   30,456x = 64,245 × 64,245
4. Step 4: Simplify right side
   30,456x = 4,127,420,025
5. Step 5: Solve for x
   x = 4,127,420,025/30,456
6. Step 6: Final answer
   x = 135,520.75