Finding the Third Proportional to 118,449 and 263,142

Step by Step Solution

1. Step 1: Write the proportion equation
   118,449 : 263,142 = 263,142 : x
2. Step 2: Convert to fraction form
   118,449/263,142 = 263,142/x
3. Step 3: Cross multiply
   118,449x = 263,142 × 263,142
4. Step 4: Simplify right side
   118,449x = 69,243,712,164
5. Step 5: Solve for x
   x = 69,243,712,164/118,449
6. Step 6: Final answer
   x = 584,586.72