Finding the Third Proportional to 353,515.50 and 768,510

Step by Step Solution

1. Step 1: Write the proportion equation
   353,515.50 : 768,510 = 768,510 : x
2. Step 2: Convert to fraction form
   353,515.50/768,510 = 768,510/x
3. Step 3: Cross multiply
   353,515.50x = 768,510 × 768,510
4. Step 4: Simplify right side
   353,515.50x = 590,607,620,100
5. Step 5: Solve for x
   x = 590,607,620,100/353,515.50
6. Step 6: Final answer
   x = 1,670,669.66