Finding the Third Proportional to 305,217 and 443,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,217 : 443,947.50 = 443,947.50 : x
2. Step 2: Convert to fraction form
   305,217/443,947.50 = 443,947.50/x
3. Step 3: Cross multiply
   305,217x = 443,947.50 × 443,947.50
4. Step 4: Simplify right side
   305,217x = 197,089,382,756.25
5. Step 5: Solve for x
   x = 197,089,382,756.25/305,217
6. Step 6: Final answer
   x = 645,735.27