Finding the Third Proportional to 101,380.50 and 209,187

Step by Step Solution

1. Step 1: Write the proportion equation
   101,380.50 : 209,187 = 209,187 : x
2. Step 2: Convert to fraction form
   101,380.50/209,187 = 209,187/x
3. Step 3: Cross multiply
   101,380.50x = 209,187 × 209,187
4. Step 4: Simplify right side
   101,380.50x = 43,759,200,969
5. Step 5: Solve for x
   x = 43,759,200,969/101,380.50
6. Step 6: Final answer
   x = 431,633.31