Finding the Third Proportional to 128,068 and 205,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,068 : 205,770.50 = 205,770.50 : x
2. Step 2: Convert to fraction form
   128,068/205,770.50 = 205,770.50/x
3. Step 3: Cross multiply
   128,068x = 205,770.50 × 205,770.50
4. Step 4: Simplify right side
   128,068x = 42,341,498,670.25
5. Step 5: Solve for x
   x = 42,341,498,670.25/128,068
6. Step 6: Final answer
   x = 330,617.32