Finding the Third Proportional to 118,456 and 254,480

Step by Step Solution

1. Step 1: Write the proportion equation
   118,456 : 254,480 = 254,480 : x
2. Step 2: Convert to fraction form
   118,456/254,480 = 254,480/x
3. Step 3: Cross multiply
   118,456x = 254,480 × 254,480
4. Step 4: Simplify right side
   118,456x = 64,760,070,400
5. Step 5: Solve for x
   x = 64,760,070,400/118,456
6. Step 6: Final answer
   x = 546,701.48