Finding the Third Proportional to 350,820 and 770,683.50

Step by Step Solution

1. Step 1: Write the proportion equation
   350,820 : 770,683.50 = 770,683.50 : x
2. Step 2: Convert to fraction form
   350,820/770,683.50 = 770,683.50/x
3. Step 3: Cross multiply
   350,820x = 770,683.50 × 770,683.50
4. Step 4: Simplify right side
   350,820x = 593,953,057,172.25
5. Step 5: Solve for x
   x = 593,953,057,172.25/350,820
6. Step 6: Final answer
   x = 1,693,042.18