Finding the Third Proportional to 140,486 and 307,200

Step by Step Solution

1. Step 1: Write the proportion equation
   140,486 : 307,200 = 307,200 : x
2. Step 2: Convert to fraction form
   140,486/307,200 = 307,200/x
3. Step 3: Cross multiply
   140,486x = 307,200 × 307,200
4. Step 4: Simplify right side
   140,486x = 94,371,840,000
5. Step 5: Solve for x
   x = 94,371,840,000/140,486
6. Step 6: Final answer
   x = 671,752.63