Finding the Third Proportional to 259,061.50 and 557,488.75

Step by Step Solution

1. Step 1: Write the proportion equation
   259,061.50 : 557,488.75 = 557,488.75 : x
2. Step 2: Convert to fraction form
   259,061.50/557,488.75 = 557,488.75/x
3. Step 3: Cross multiply
   259,061.50x = 557,488.75 × 557,488.75
4. Step 4: Simplify right side
   259,061.50x = 310,793,706,376.56
5. Step 5: Solve for x
   x = 310,793,706,376.56/259,061.50
6. Step 6: Final answer
   x = 1,199,690.83