Finding the Third Proportional to 300,979.50 and 626,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,979.50 : 626,869.50 = 626,869.50 : x
2. Step 2: Convert to fraction form
   300,979.50/626,869.50 = 626,869.50/x
3. Step 3: Cross multiply
   300,979.50x = 626,869.50 × 626,869.50
4. Step 4: Simplify right side
   300,979.50x = 392,965,370,030.25
5. Step 5: Solve for x
   x = 392,965,370,030.25/300,979.50
6. Step 6: Final answer
   x = 1,305,621.71