Finding the Third Proportional to 89,989 and 139,701

Step by Step Solution

1. Step 1: Write the proportion equation
   89,989 : 139,701 = 139,701 : x
2. Step 2: Convert to fraction form
   89,989/139,701 = 139,701/x
3. Step 3: Cross multiply
   89,989x = 139,701 × 139,701
4. Step 4: Simplify right side
   89,989x = 19,516,369,401
5. Step 5: Solve for x
   x = 19,516,369,401/89,989
6. Step 6: Final answer
   x = 216,875.06