Finding the Third Proportional to 128,493 and 204,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,493 : 204,619.50 = 204,619.50 : x
2. Step 2: Convert to fraction form
   128,493/204,619.50 = 204,619.50/x
3. Step 3: Cross multiply
   128,493x = 204,619.50 × 204,619.50
4. Step 4: Simplify right side
   128,493x = 41,869,139,780.25
5. Step 5: Solve for x
   x = 41,869,139,780.25/128,493
6. Step 6: Final answer
   x = 325,847.63