Finding the Third Proportional to 92,419.50 and 139,287

Step by Step Solution

1. Step 1: Write the proportion equation
   92,419.50 : 139,287 = 139,287 : x
2. Step 2: Convert to fraction form
   92,419.50/139,287 = 139,287/x
3. Step 3: Cross multiply
   92,419.50x = 139,287 × 139,287
4. Step 4: Simplify right side
   92,419.50x = 19,400,868,369
5. Step 5: Solve for x
   x = 19,400,868,369/92,419.50
6. Step 6: Final answer
   x = 209,921.81