Finding the Third Proportional to 85,900.50 and 188,739

Step by Step Solution

1. Step 1: Write the proportion equation
   85,900.50 : 188,739 = 188,739 : x
2. Step 2: Convert to fraction form
   85,900.50/188,739 = 188,739/x
3. Step 3: Cross multiply
   85,900.50x = 188,739 × 188,739
4. Step 4: Simplify right side
   85,900.50x = 35,622,410,121
5. Step 5: Solve for x
   x = 35,622,410,121/85,900.50
6. Step 6: Final answer
   x = 414,693.86