Finding the Third Proportional to 64,970 and 139,611

Step by Step Solution

1. Step 1: Write the proportion equation
   64,970 : 139,611 = 139,611 : x
2. Step 2: Convert to fraction form
   64,970/139,611 = 139,611/x
3. Step 3: Cross multiply
   64,970x = 139,611 × 139,611
4. Step 4: Simplify right side
   64,970x = 19,491,231,321
5. Step 5: Solve for x
   x = 19,491,231,321/64,970
6. Step 6: Final answer
   x = 300,003.56