Finding the Third Proportional to 31,465 and 64,388

Step by Step Solution

1. Step 1: Write the proportion equation
   31,465 : 64,388 = 64,388 : x
2. Step 2: Convert to fraction form
   31,465/64,388 = 64,388/x
3. Step 3: Cross multiply
   31,465x = 64,388 × 64,388
4. Step 4: Simplify right side
   31,465x = 4,145,814,544
5. Step 5: Solve for x
   x = 4,145,814,544/31,465
6. Step 6: Final answer
   x = 131,759.56