Finding the Third Proportional to 90,084 and 139,497

Step by Step Solution

1. Step 1: Write the proportion equation
   90,084 : 139,497 = 139,497 : x
2. Step 2: Convert to fraction form
   90,084/139,497 = 139,497/x
3. Step 3: Cross multiply
   90,084x = 139,497 × 139,497
4. Step 4: Simplify right side
   90,084x = 19,459,413,009
5. Step 5: Solve for x
   x = 19,459,413,009/90,084
6. Step 6: Final answer
   x = 216,014.09