Finding the Third Proportional to 90,624 and 139,976

Step by Step Solution

1. Step 1: Write the proportion equation
   90,624 : 139,976 = 139,976 : x
2. Step 2: Convert to fraction form
   90,624/139,976 = 139,976/x
3. Step 3: Cross multiply
   90,624x = 139,976 × 139,976
4. Step 4: Simplify right side
   90,624x = 19,593,280,576
5. Step 5: Solve for x
   x = 19,593,280,576/90,624
6. Step 6: Final answer
   x = 216,204.10