Finding the Third Proportional to 92,187 and 139,128

Step by Step Solution

1. Step 1: Write the proportion equation
   92,187 : 139,128 = 139,128 : x
2. Step 2: Convert to fraction form
   92,187/139,128 = 139,128/x
3. Step 3: Cross multiply
   92,187x = 139,128 × 139,128
4. Step 4: Simplify right side
   92,187x = 19,356,600,384
5. Step 5: Solve for x
   x = 19,356,600,384/92,187
6. Step 6: Final answer
   x = 209,971.04