Finding the Third Proportional to 139,291 and 208,938

Step by Step Solution

1. Step 1: Write the proportion equation
   139,291 : 208,938 = 208,938 : x
2. Step 2: Convert to fraction form
   139,291/208,938 = 208,938/x
3. Step 3: Cross multiply
   139,291x = 208,938 × 208,938
4. Step 4: Simplify right side
   139,291x = 43,655,087,844
5. Step 5: Solve for x
   x = 43,655,087,844/139,291
6. Step 6: Final answer
   x = 313,409.25