Finding the Third Proportional to 318,724.50 and 695,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,724.50 : 695,404.50 = 695,404.50 : x
2. Step 2: Convert to fraction form
   318,724.50/695,404.50 = 695,404.50/x
3. Step 3: Cross multiply
   318,724.50x = 695,404.50 × 695,404.50
4. Step 4: Simplify right side
   318,724.50x = 483,587,418,620.25
5. Step 5: Solve for x
   x = 483,587,418,620.25/318,724.50
6. Step 6: Final answer
   x = 1,517,258.38