Finding the Third Proportional to 354,885 and 769,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,885 : 769,663.50 = 769,663.50 : x
2. Step 2: Convert to fraction form
   354,885/769,663.50 = 769,663.50/x
3. Step 3: Cross multiply
   354,885x = 769,663.50 × 769,663.50
4. Step 4: Simplify right side
   354,885x = 592,381,903,232.25
5. Step 5: Solve for x
   x = 592,381,903,232.25/354,885
6. Step 6: Final answer
   x = 1,669,222.15