Finding the Third Proportional to 354,890 and 774,013.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,890 : 774,013.50 = 774,013.50 : x
2. Step 2: Convert to fraction form
   354,890/774,013.50 = 774,013.50/x
3. Step 3: Cross multiply
   354,890x = 774,013.50 × 774,013.50
4. Step 4: Simplify right side
   354,890x = 599,096,898,182.25
5. Step 5: Solve for x
   x = 599,096,898,182.25/354,890
6. Step 6: Final answer
   x = 1,688,119.98