Finding the Third Proportional to 139,648 and 301,440

Step by Step Solution

1. Step 1: Write the proportion equation
   139,648 : 301,440 = 301,440 : x
2. Step 2: Convert to fraction form
   139,648/301,440 = 301,440/x
3. Step 3: Cross multiply
   139,648x = 301,440 × 301,440
4. Step 4: Simplify right side
   139,648x = 90,866,073,600
5. Step 5: Solve for x
   x = 90,866,073,600/139,648
6. Step 6: Final answer
   x = 650,679.38