Finding the Third Proportional to 20,660.50 and 42,410

Step by Step Solution

1. Step 1: Write the proportion equation
   20,660.50 : 42,410 = 42,410 : x
2. Step 2: Convert to fraction form
   20,660.50/42,410 = 42,410/x
3. Step 3: Cross multiply
   20,660.50x = 42,410 × 42,410
4. Step 4: Simplify right side
   20,660.50x = 1,798,608,100
5. Step 5: Solve for x
   x = 1,798,608,100/20,660.50
6. Step 6: Final answer
   x = 87,055.40