Finding the Third Proportional to 254,359.50 and 404,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   254,359.50 : 404,889.50 = 404,889.50 : x
2. Step 2: Convert to fraction form
   254,359.50/404,889.50 = 404,889.50/x
3. Step 3: Cross multiply
   254,359.50x = 404,889.50 × 404,889.50
4. Step 4: Simplify right side
   254,359.50x = 163,935,507,210.25
5. Step 5: Solve for x
   x = 163,935,507,210.25/254,359.50
6. Step 6: Final answer
   x = 644,503.18