Finding the Third Proportional to 42,860 and 65,920

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860 : 65,920 = 65,920 : x
2. Step 2: Convert to fraction form
   42,860/65,920 = 65,920/x
3. Step 3: Cross multiply
   42,860x = 65,920 × 65,920
4. Step 4: Simplify right side
   42,860x = 4,345,446,400
5. Step 5: Solve for x
   x = 4,345,446,400/42,860
6. Step 6: Final answer
   x = 101,386.99