Finding the Third Proportional to 128,565.98 and 196,112.39

Step by Step Solution

1. Step 1: Write the proportion equation
   128,565.98 : 196,112.39 = 196,112.39 : x
2. Step 2: Convert to fraction form
   128,565.98/196,112.39 = 196,112.39/x
3. Step 3: Cross multiply
   128,565.98x = 196,112.39 × 196,112.39
4. Step 4: Simplify right side
   128,565.98x = 38,460,069,756.65
5. Step 5: Solve for x
   x = 38,460,069,756.65/128,565.98
6. Step 6: Final answer
   x = 299,146.54