Finding the Third Proportional to 245,430 and 328,414.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,430 : 328,414.50 = 328,414.50 : x
2. Step 2: Convert to fraction form
   245,430/328,414.50 = 328,414.50/x
3. Step 3: Cross multiply
   245,430x = 328,414.50 × 328,414.50
4. Step 4: Simplify right side
   245,430x = 107,856,083,810.25
5. Step 5: Solve for x
   x = 107,856,083,810.25/245,430
6. Step 6: Final answer
   x = 439,457.62