Finding the Third Proportional to 287,726 and 435,587.25

Step by Step Solution

1. Step 1: Write the proportion equation
   287,726 : 435,587.25 = 435,587.25 : x
2. Step 2: Convert to fraction form
   287,726/435,587.25 = 435,587.25/x
3. Step 3: Cross multiply
   287,726x = 435,587.25 × 435,587.25
4. Step 4: Simplify right side
   287,726x = 189,736,252,362.56
5. Step 5: Solve for x
   x = 189,736,252,362.56/287,726
6. Step 6: Final answer
   x = 659,433.81