Finding the Third Proportional to 30,285 and 64,740

Step by Step Solution

1. Step 1: Write the proportion equation
   30,285 : 64,740 = 64,740 : x
2. Step 2: Convert to fraction form
   30,285/64,740 = 64,740/x
3. Step 3: Cross multiply
   30,285x = 64,740 × 64,740
4. Step 4: Simplify right side
   30,285x = 4,191,267,600
5. Step 5: Solve for x
   x = 4,191,267,600/30,285
6. Step 6: Final answer
   x = 138,394.18