Finding the Third Proportional to 139,336 and 298,361

Step by Step Solution

1. Step 1: Write the proportion equation
   139,336 : 298,361 = 298,361 : x
2. Step 2: Convert to fraction form
   139,336/298,361 = 298,361/x
3. Step 3: Cross multiply
   139,336x = 298,361 × 298,361
4. Step 4: Simplify right side
   139,336x = 89,019,286,321
5. Step 5: Solve for x
   x = 89,019,286,321/139,336
6. Step 6: Final answer
   x = 638,882.17