Finding the Third Proportional to 40,780 and 60,412

Step by Step Solution

1. Step 1: Write the proportion equation
   40,780 : 60,412 = 60,412 : x
2. Step 2: Convert to fraction form
   40,780/60,412 = 60,412/x
3. Step 3: Cross multiply
   40,780x = 60,412 × 60,412
4. Step 4: Simplify right side
   40,780x = 3,649,609,744
5. Step 5: Solve for x
   x = 3,649,609,744/40,780
6. Step 6: Final answer
   x = 89,495.09