Finding the Third Proportional to 64,264 and 139,280

Step by Step Solution

1. Step 1: Write the proportion equation
   64,264 : 139,280 = 139,280 : x
2. Step 2: Convert to fraction form
   64,264/139,280 = 139,280/x
3. Step 3: Cross multiply
   64,264x = 139,280 × 139,280
4. Step 4: Simplify right side
   64,264x = 19,398,918,400
5. Step 5: Solve for x
   x = 19,398,918,400/64,264
6. Step 6: Final answer
   x = 301,862.92