Finding the Third Proportional to 356,948.50 and 779,009.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,948.50 : 779,009.50 = 779,009.50 : x
2. Step 2: Convert to fraction form
   356,948.50/779,009.50 = 779,009.50/x
3. Step 3: Cross multiply
   356,948.50x = 779,009.50 × 779,009.50
4. Step 4: Simplify right side
   356,948.50x = 606,855,801,090.25
5. Step 5: Solve for x
   x = 606,855,801,090.25/356,948.50
6. Step 6: Final answer
   x = 1,700,121.45