Finding the Third Proportional to 30,972 and 65,940

Step by Step Solution

1. Step 1: Write the proportion equation
   30,972 : 65,940 = 65,940 : x
2. Step 2: Convert to fraction form
   30,972/65,940 = 65,940/x
3. Step 3: Cross multiply
   30,972x = 65,940 × 65,940
4. Step 4: Simplify right side
   30,972x = 4,348,083,600
5. Step 5: Solve for x
   x = 4,348,083,600/30,972
6. Step 6: Final answer
   x = 140,387.56