Finding the Third Proportional to 128,034 and 280,176.75

Step by Step Solution

1. Step 1: Write the proportion equation
   128,034 : 280,176.75 = 280,176.75 : x
2. Step 2: Convert to fraction form
   128,034/280,176.75 = 280,176.75/x
3. Step 3: Cross multiply
   128,034x = 280,176.75 × 280,176.75
4. Step 4: Simplify right side
   128,034x = 78,499,011,240.56
5. Step 5: Solve for x
   x = 78,499,011,240.56/128,034
6. Step 6: Final answer
   x = 613,110.67