Finding the Third Proportional to 139,649 and 301,438

Step by Step Solution

1. Step 1: Write the proportion equation
   139,649 : 301,438 = 301,438 : x
2. Step 2: Convert to fraction form
   139,649/301,438 = 301,438/x
3. Step 3: Cross multiply
   139,649x = 301,438 × 301,438
4. Step 4: Simplify right side
   139,649x = 90,864,867,844
5. Step 5: Solve for x
   x = 90,864,867,844/139,649
6. Step 6: Final answer
   x = 650,666.08