Finding the Third Proportional to 90,282 and 139,723

Step by Step Solution

1. Step 1: Write the proportion equation
   90,282 : 139,723 = 139,723 : x
2. Step 2: Convert to fraction form
   90,282/139,723 = 139,723/x
3. Step 3: Cross multiply
   90,282x = 139,723 × 139,723
4. Step 4: Simplify right side
   90,282x = 19,522,516,729
5. Step 5: Solve for x
   x = 19,522,516,729/90,282
6. Step 6: Final answer
   x = 216,239.30