Finding the Third Proportional to 326,718 and 490,056.75

Step by Step Solution

1. Step 1: Write the proportion equation
   326,718 : 490,056.75 = 490,056.75 : x
2. Step 2: Convert to fraction form
   326,718/490,056.75 = 490,056.75/x
3. Step 3: Cross multiply
   326,718x = 490,056.75 × 490,056.75
4. Step 4: Simplify right side
   326,718x = 240,155,618,220.56
5. Step 5: Solve for x
   x = 240,155,618,220.56/326,718
6. Step 6: Final answer
   x = 735,054.75