Finding the Third Proportional to 118,242 and 253,980

Step by Step Solution

1. Step 1: Write the proportion equation
   118,242 : 253,980 = 253,980 : x
2. Step 2: Convert to fraction form
   118,242/253,980 = 253,980/x
3. Step 3: Cross multiply
   118,242x = 253,980 × 253,980
4. Step 4: Simplify right side
   118,242x = 64,505,840,400
5. Step 5: Solve for x
   x = 64,505,840,400/118,242
6. Step 6: Final answer
   x = 545,540.84