Finding the Third Proportional to 116,143 and 254,418

Step by Step Solution

1. Step 1: Write the proportion equation
   116,143 : 254,418 = 254,418 : x
2. Step 2: Convert to fraction form
   116,143/254,418 = 254,418/x
3. Step 3: Cross multiply
   116,143x = 254,418 × 254,418
4. Step 4: Simplify right side
   116,143x = 64,728,518,724
5. Step 5: Solve for x
   x = 64,728,518,724/116,143
6. Step 6: Final answer
   x = 557,317.43