Finding the Third Proportional to 287,714 and 435,569.25

Step by Step Solution

1. Step 1: Write the proportion equation
   287,714 : 435,569.25 = 435,569.25 : x
2. Step 2: Convert to fraction form
   287,714/435,569.25 = 435,569.25/x
3. Step 3: Cross multiply
   287,714x = 435,569.25 × 435,569.25
4. Step 4: Simplify right side
   287,714x = 189,720,571,545.56
5. Step 5: Solve for x
   x = 189,720,571,545.56/287,714
6. Step 6: Final answer
   x = 659,406.81