Finding the Third Proportional to 259,851 and 388,716.94

Step by Step Solution

1. Step 1: Write the proportion equation
   259,851 : 388,716.94 = 388,716.94 : x
2. Step 2: Convert to fraction form
   259,851/388,716.94 = 388,716.94/x
3. Step 3: Cross multiply
   259,851x = 388,716.94 × 388,716.94
4. Step 4: Simplify right side
   259,851x = 151,100,857,499.38
5. Step 5: Solve for x
   x = 151,100,857,499.38/259,851
6. Step 6: Final answer
   x = 581,490.38