Finding the Third Proportional to 139,374 and 298,422

Step by Step Solution

1. Step 1: Write the proportion equation
   139,374 : 298,422 = 298,422 : x
2. Step 2: Convert to fraction form
   139,374/298,422 = 298,422/x
3. Step 3: Cross multiply
   139,374x = 298,422 × 298,422
4. Step 4: Simplify right side
   139,374x = 89,055,690,084
5. Step 5: Solve for x
   x = 89,055,690,084/139,374
6. Step 6: Final answer
   x = 638,969.18