Finding the Third Proportional to 139,264 and 208,372

Step by Step Solution

1. Step 1: Write the proportion equation
   139,264 : 208,372 = 208,372 : x
2. Step 2: Convert to fraction form
   139,264/208,372 = 208,372/x
3. Step 3: Cross multiply
   139,264x = 208,372 × 208,372
4. Step 4: Simplify right side
   139,264x = 43,418,890,384
5. Step 5: Solve for x
   x = 43,418,890,384/139,264
6. Step 6: Final answer
   x = 311,773.97