Finding the Third Proportional to 64,307 and 139,012

Step by Step Solution

1. Step 1: Write the proportion equation
   64,307 : 139,012 = 139,012 : x
2. Step 2: Convert to fraction form
   64,307/139,012 = 139,012/x
3. Step 3: Cross multiply
   64,307x = 139,012 × 139,012
4. Step 4: Simplify right side
   64,307x = 19,324,336,144
5. Step 5: Solve for x
   x = 19,324,336,144/64,307
6. Step 6: Final answer
   x = 300,501.29