Finding the Third Proportional to 128,069 and 205,772.25

Step by Step Solution

1. Step 1: Write the proportion equation
   128,069 : 205,772.25 = 205,772.25 : x
2. Step 2: Convert to fraction form
   128,069/205,772.25 = 205,772.25/x
3. Step 3: Cross multiply
   128,069x = 205,772.25 × 205,772.25
4. Step 4: Simplify right side
   128,069x = 42,342,218,870.06
5. Step 5: Solve for x
   x = 42,342,218,870.06/128,069
6. Step 6: Final answer
   x = 330,620.36