Finding the Third Proportional to 155,491.50 and 326,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,491.50 : 326,647.50 = 326,647.50 : x
2. Step 2: Convert to fraction form
   155,491.50/326,647.50 = 326,647.50/x
3. Step 3: Cross multiply
   155,491.50x = 326,647.50 × 326,647.50
4. Step 4: Simplify right side
   155,491.50x = 106,698,589,256.25
5. Step 5: Solve for x
   x = 106,698,589,256.25/155,491.50
6. Step 6: Final answer
   x = 686,202.07