Finding the Third Proportional to 363,709 and 790,372.50

Step by Step Solution

1. Step 1: Write the proportion equation
   363,709 : 790,372.50 = 790,372.50 : x
2. Step 2: Convert to fraction form
   363,709/790,372.50 = 790,372.50/x
3. Step 3: Cross multiply
   363,709x = 790,372.50 × 790,372.50
4. Step 4: Simplify right side
   363,709x = 624,688,688,756.25
5. Step 5: Solve for x
   x = 624,688,688,756.25/363,709
6. Step 6: Final answer
   x = 1,717,550.81