Finding the Third Proportional to 287,727 and 435,587.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,727 : 435,587.50 = 435,587.50 : x
2. Step 2: Convert to fraction form
   287,727/435,587.50 = 435,587.50/x
3. Step 3: Cross multiply
   287,727x = 435,587.50 × 435,587.50
4. Step 4: Simplify right side
   287,727x = 189,736,470,156.25
5. Step 5: Solve for x
   x = 189,736,470,156.25/287,727
6. Step 6: Final answer
   x = 659,432.27