Finding the Third Proportional to 139,620 and 301,644

Step by Step Solution

1. Step 1: Write the proportion equation
   139,620 : 301,644 = 301,644 : x
2. Step 2: Convert to fraction form
   139,620/301,644 = 301,644/x
3. Step 3: Cross multiply
   139,620x = 301,644 × 301,644
4. Step 4: Simplify right side
   139,620x = 90,989,102,736
5. Step 5: Solve for x
   x = 90,989,102,736/139,620
6. Step 6: Final answer
   x = 651,691.04