Finding the Third Proportional to 139,368 and 298,410

Step by Step Solution

1. Step 1: Write the proportion equation
   139,368 : 298,410 = 298,410 : x
2. Step 2: Convert to fraction form
   139,368/298,410 = 298,410/x
3. Step 3: Cross multiply
   139,368x = 298,410 × 298,410
4. Step 4: Simplify right side
   139,368x = 89,048,528,100
5. Step 5: Solve for x
   x = 89,048,528,100/139,368
6. Step 6: Final answer
   x = 638,945.30