Finding the Third Proportional to 124,659 and 256,668.75

Step by Step Solution

1. Step 1: Write the proportion equation
   124,659 : 256,668.75 = 256,668.75 : x
2. Step 2: Convert to fraction form
   124,659/256,668.75 = 256,668.75/x
3. Step 3: Cross multiply
   124,659x = 256,668.75 × 256,668.75
4. Step 4: Simplify right side
   124,659x = 65,878,847,226.56
5. Step 5: Solve for x
   x = 65,878,847,226.56/124,659
6. Step 6: Final answer
   x = 528,472.45