Finding the Third Proportional to 287,759.81 and 626,607

Step by Step Solution

1. Step 1: Write the proportion equation
   287,759.81 : 626,607 = 626,607 : x
2. Step 2: Convert to fraction form
   287,759.81/626,607 = 626,607/x
3. Step 3: Cross multiply
   287,759.81x = 626,607 × 626,607
4. Step 4: Simplify right side
   287,759.81x = 392,636,332,449
5. Step 5: Solve for x
   x = 392,636,332,449/287,759.81
6. Step 6: Final answer
   x = 1,364,458.54