Finding the Third Proportional to 64,663 and 139,520

Step by Step Solution

1. Step 1: Write the proportion equation
   64,663 : 139,520 = 139,520 : x
2. Step 2: Convert to fraction form
   64,663/139,520 = 139,520/x
3. Step 3: Cross multiply
   64,663x = 139,520 × 139,520
4. Step 4: Simplify right side
   64,663x = 19,465,830,400
5. Step 5: Solve for x
   x = 19,465,830,400/64,663
6. Step 6: Final answer
   x = 301,035.06