Finding the Third Proportional to 20,518 and 42,764

Step by Step Solution

1. Step 1: Write the proportion equation
   20,518 : 42,764 = 42,764 : x
2. Step 2: Convert to fraction form
   20,518/42,764 = 42,764/x
3. Step 3: Cross multiply
   20,518x = 42,764 × 42,764
4. Step 4: Simplify right side
   20,518x = 1,828,759,696
5. Step 5: Solve for x
   x = 1,828,759,696/20,518
6. Step 6: Final answer
   x = 89,129.53