Finding the Third Proportional to 318,404.25 and 693,022.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,404.25 : 693,022.50 = 693,022.50 : x
2. Step 2: Convert to fraction form
   318,404.25/693,022.50 = 693,022.50/x
3. Step 3: Cross multiply
   318,404.25x = 693,022.50 × 693,022.50
4. Step 4: Simplify right side
   318,404.25x = 480,280,185,506.25
5. Step 5: Solve for x
   x = 480,280,185,506.25/318,404.25
6. Step 6: Final answer
   x = 1,508,397.53