Finding the Third Proportional to 128,259 and 197,430.75

Step by Step Solution

1. Step 1: Write the proportion equation
   128,259 : 197,430.75 = 197,430.75 : x
2. Step 2: Convert to fraction form
   128,259/197,430.75 = 197,430.75/x
3. Step 3: Cross multiply
   128,259x = 197,430.75 × 197,430.75
4. Step 4: Simplify right side
   128,259x = 38,978,901,045.56
5. Step 5: Solve for x
   x = 38,978,901,045.56/128,259
6. Step 6: Final answer
   x = 303,907.73