Finding the Third Proportional to 307,152 and 669,978

Step by Step Solution

1. Step 1: Write the proportion equation
   307,152 : 669,978 = 669,978 : x
2. Step 2: Convert to fraction form
   307,152/669,978 = 669,978/x
3. Step 3: Cross multiply
   307,152x = 669,978 × 669,978
4. Step 4: Simplify right side
   307,152x = 448,870,520,484
5. Step 5: Solve for x
   x = 448,870,520,484/307,152
6. Step 6: Final answer
   x = 1,461,395.40