Finding the Third Proportional to 31,300 and 64,672

Step by Step Solution

1. Step 1: Write the proportion equation
   31,300 : 64,672 = 64,672 : x
2. Step 2: Convert to fraction form
   31,300/64,672 = 64,672/x
3. Step 3: Cross multiply
   31,300x = 64,672 × 64,672
4. Step 4: Simplify right side
   31,300x = 4,182,467,584
5. Step 5: Solve for x
   x = 4,182,467,584/31,300
6. Step 6: Final answer
   x = 133,625.16