Finding the Third Proportional to 40,890 and 61,540

Step by Step Solution

1. Step 1: Write the proportion equation
   40,890 : 61,540 = 61,540 : x
2. Step 2: Convert to fraction form
   40,890/61,540 = 61,540/x
3. Step 3: Cross multiply
   40,890x = 61,540 × 61,540
4. Step 4: Simplify right side
   40,890x = 3,787,171,600
5. Step 5: Solve for x
   x = 3,787,171,600/40,890
6. Step 6: Final answer
   x = 92,618.53