Finding the Third Proportional to 42,720 and 59,912

Step by Step Solution

1. Step 1: Write the proportion equation
   42,720 : 59,912 = 59,912 : x
2. Step 2: Convert to fraction form
   42,720/59,912 = 59,912/x
3. Step 3: Cross multiply
   42,720x = 59,912 × 59,912
4. Step 4: Simplify right side
   42,720x = 3,589,447,744
5. Step 5: Solve for x
   x = 3,589,447,744/42,720
6. Step 6: Final answer
   x = 84,022.65