Finding the Third Proportional to 85,120.50 and 128,866

Step by Step Solution

1. Step 1: Write the proportion equation
   85,120.50 : 128,866 = 128,866 : x
2. Step 2: Convert to fraction form
   85,120.50/128,866 = 128,866/x
3. Step 3: Cross multiply
   85,120.50x = 128,866 × 128,866
4. Step 4: Simplify right side
   85,120.50x = 16,606,445,956
5. Step 5: Solve for x
   x = 16,606,445,956/85,120.50
6. Step 6: Final answer
   x = 195,093.38