Finding the Third Proportional to 118,568 and 256,820

Step by Step Solution

1. Step 1: Write the proportion equation
   118,568 : 256,820 = 256,820 : x
2. Step 2: Convert to fraction form
   118,568/256,820 = 256,820/x
3. Step 3: Cross multiply
   118,568x = 256,820 × 256,820
4. Step 4: Simplify right side
   118,568x = 65,956,512,400
5. Step 5: Solve for x
   x = 65,956,512,400/118,568
6. Step 6: Final answer
   x = 556,275.83