Finding the Third Proportional to 20,243 and 42,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,243 : 42,686.50 = 42,686.50 : x
2. Step 2: Convert to fraction form
   20,243/42,686.50 = 42,686.50/x
3. Step 3: Cross multiply
   20,243x = 42,686.50 × 42,686.50
4. Step 4: Simplify right side
   20,243x = 1,822,137,282.25
5. Step 5: Solve for x
   x = 1,822,137,282.25/20,243
6. Step 6: Final answer
   x = 90,013.20