Finding the Third Proportional to 140,292 and 306,870

Step by Step Solution

1. Step 1: Write the proportion equation
   140,292 : 306,870 = 306,870 : x
2. Step 2: Convert to fraction form
   140,292/306,870 = 306,870/x
3. Step 3: Cross multiply
   140,292x = 306,870 × 306,870
4. Step 4: Simplify right side
   140,292x = 94,169,196,900
5. Step 5: Solve for x
   x = 94,169,196,900/140,292
6. Step 6: Final answer
   x = 671,237.11