Finding the Third Proportional to 300,109.50 and 708,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,109.50 : 708,436.50 = 708,436.50 : x
2. Step 2: Convert to fraction form
   300,109.50/708,436.50 = 708,436.50/x
3. Step 3: Cross multiply
   300,109.50x = 708,436.50 × 708,436.50
4. Step 4: Simplify right side
   300,109.50x = 501,882,274,532.25
5. Step 5: Solve for x
   x = 501,882,274,532.25/300,109.50
6. Step 6: Final answer
   x = 1,672,330.51