Finding the Third Proportional to 496,620 and 768,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   496,620 : 768,820.50 = 768,820.50 : x
2. Step 2: Convert to fraction form
   496,620/768,820.50 = 768,820.50/x
3. Step 3: Cross multiply
   496,620x = 768,820.50 × 768,820.50
4. Step 4: Simplify right side
   496,620x = 591,084,961,220.25
5. Step 5: Solve for x
   x = 591,084,961,220.25/496,620
6. Step 6: Final answer
   x = 1,190,215.78