Finding the Third Proportional to 129,957 and 206,764.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,957 : 206,764.50 = 206,764.50 : x
2. Step 2: Convert to fraction form
   129,957/206,764.50 = 206,764.50/x
3. Step 3: Cross multiply
   129,957x = 206,764.50 × 206,764.50
4. Step 4: Simplify right side
   129,957x = 42,751,558,460.25
5. Step 5: Solve for x
   x = 42,751,558,460.25/129,957
6. Step 6: Final answer
   x = 328,966.95