Finding the Third Proportional to 20,342 and 41,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,342 : 41,990.50 = 41,990.50 : x
2. Step 2: Convert to fraction form
   20,342/41,990.50 = 41,990.50/x
3. Step 3: Cross multiply
   20,342x = 41,990.50 × 41,990.50
4. Step 4: Simplify right side
   20,342x = 1,763,202,090.25
5. Step 5: Solve for x
   x = 1,763,202,090.25/20,342
6. Step 6: Final answer
   x = 86,677.91