Finding the Third Proportional to 39,915 and 59,878

Step by Step Solution

1. Step 1: Write the proportion equation
   39,915 : 59,878 = 59,878 : x
2. Step 2: Convert to fraction form
   39,915/59,878 = 59,878/x
3. Step 3: Cross multiply
   39,915x = 59,878 × 59,878
4. Step 4: Simplify right side
   39,915x = 3,585,374,884
5. Step 5: Solve for x
   x = 3,585,374,884/39,915
6. Step 6: Final answer
   x = 89,825.25