Finding the Third Proportional to 287,724 and 435,583.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,724 : 435,583.50 = 435,583.50 : x
2. Step 2: Convert to fraction form
   287,724/435,583.50 = 435,583.50/x
3. Step 3: Cross multiply
   287,724x = 435,583.50 × 435,583.50
4. Step 4: Simplify right side
   287,724x = 189,732,985,472.25
5. Step 5: Solve for x
   x = 189,732,985,472.25/287,724
6. Step 6: Final answer
   x = 659,427.04