Finding the Third Proportional to 20,019.66 and 42,508.55

Step by Step Solution

1. Step 1: Write the proportion equation
   20,019.66 : 42,508.55 = 42,508.55 : x
2. Step 2: Convert to fraction form
   20,019.66/42,508.55 = 42,508.55/x
3. Step 3: Cross multiply
   20,019.66x = 42,508.55 × 42,508.55
4. Step 4: Simplify right side
   20,019.66x = 1,806,976,557.42
5. Step 5: Solve for x
   x = 1,806,976,557.42/20,019.66
6. Step 6: Final answer
   x = 90,260.12