Finding the Third Proportional to 259,117.50 and 560,679

Step by Step Solution

1. Step 1: Write the proportion equation
   259,117.50 : 560,679 = 560,679 : x
2. Step 2: Convert to fraction form
   259,117.50/560,679 = 560,679/x
3. Step 3: Cross multiply
   259,117.50x = 560,679 × 560,679
4. Step 4: Simplify right side
   259,117.50x = 314,360,941,041
5. Step 5: Solve for x
   x = 314,360,941,041/259,117.50
6. Step 6: Final answer
   x = 1,213,198.42