Finding the Third Proportional to 354,912.50 and 774,055.56

Step by Step Solution

1. Step 1: Write the proportion equation
   354,912.50 : 774,055.56 = 774,055.56 : x
2. Step 2: Convert to fraction form
   354,912.50/774,055.56 = 774,055.56/x
3. Step 3: Cross multiply
   354,912.50x = 774,055.56 × 774,055.56
4. Step 4: Simplify right side
   354,912.50x = 599,162,013,837.19
5. Step 5: Solve for x
   x = 599,162,013,837.19/354,912.50
6. Step 6: Final answer
   x = 1,688,196.43