Finding the Third Proportional to 138,280 and 303,456

Step by Step Solution

1. Step 1: Write the proportion equation
   138,280 : 303,456 = 303,456 : x
2. Step 2: Convert to fraction form
   138,280/303,456 = 303,456/x
3. Step 3: Cross multiply
   138,280x = 303,456 × 303,456
4. Step 4: Simplify right side
   138,280x = 92,085,543,936
5. Step 5: Solve for x
   x = 92,085,543,936/138,280
6. Step 6: Final answer
   x = 665,935.38