Finding the Third Proportional to 287,013.75 and 626,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,013.75 : 626,488.50 = 626,488.50 : x
2. Step 2: Convert to fraction form
   287,013.75/626,488.50 = 626,488.50/x
3. Step 3: Cross multiply
   287,013.75x = 626,488.50 × 626,488.50
4. Step 4: Simplify right side
   287,013.75x = 392,487,840,632.25
5. Step 5: Solve for x
   x = 392,487,840,632.25/287,013.75
6. Step 6: Final answer
   x = 1,367,487.94