Finding the Third Proportional to 259,456.50 and 569,991

Step by Step Solution

1. Step 1: Write the proportion equation
   259,456.50 : 569,991 = 569,991 : x
2. Step 2: Convert to fraction form
   259,456.50/569,991 = 569,991/x
3. Step 3: Cross multiply
   259,456.50x = 569,991 × 569,991
4. Step 4: Simplify right side
   259,456.50x = 324,889,740,081
5. Step 5: Solve for x
   x = 324,889,740,081/259,456.50
6. Step 6: Final answer
   x = 1,252,193.49