Finding the Third Proportional to 128,069.50 and 205,773

Step by Step Solution

1. Step 1: Write the proportion equation
   128,069.50 : 205,773 = 205,773 : x
2. Step 2: Convert to fraction form
   128,069.50/205,773 = 205,773/x
3. Step 3: Cross multiply
   128,069.50x = 205,773 × 205,773
4. Step 4: Simplify right side
   128,069.50x = 42,342,527,529
5. Step 5: Solve for x
   x = 42,342,527,529/128,069.50
6. Step 6: Final answer
   x = 330,621.48