Finding the Third Proportional to 140,629 and 307,970

Step by Step Solution

1. Step 1: Write the proportion equation
   140,629 : 307,970 = 307,970 : x
2. Step 2: Convert to fraction form
   140,629/307,970 = 307,970/x
3. Step 3: Cross multiply
   140,629x = 307,970 × 307,970
4. Step 4: Simplify right side
   140,629x = 94,845,520,900
5. Step 5: Solve for x
   x = 94,845,520,900/140,629
6. Step 6: Final answer
   x = 674,437.85