Finding the Third Proportional to 118,510 and 259,191

Step by Step Solution

1. Step 1: Write the proportion equation
   118,510 : 259,191 = 259,191 : x
2. Step 2: Convert to fraction form
   118,510/259,191 = 259,191/x
3. Step 3: Cross multiply
   118,510x = 259,191 × 259,191
4. Step 4: Simplify right side
   118,510x = 67,179,974,481
5. Step 5: Solve for x
   x = 67,179,974,481/118,510
6. Step 6: Final answer
   x = 566,871.78