Finding the Third Proportional to 139,825 and 302,978

Step by Step Solution

1. Step 1: Write the proportion equation
   139,825 : 302,978 = 302,978 : x
2. Step 2: Convert to fraction form
   139,825/302,978 = 302,978/x
3. Step 3: Cross multiply
   139,825x = 302,978 × 302,978
4. Step 4: Simplify right side
   139,825x = 91,795,668,484
5. Step 5: Solve for x
   x = 91,795,668,484/139,825
6. Step 6: Final answer
   x = 656,503.98