Finding the Third Proportional to 478,611 and 697,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,611 : 697,144.50 = 697,144.50 : x
2. Step 2: Convert to fraction form
   478,611/697,144.50 = 697,144.50/x
3. Step 3: Cross multiply
   478,611x = 697,144.50 × 697,144.50
4. Step 4: Simplify right side
   478,611x = 486,010,453,880.25
5. Step 5: Solve for x
   x = 486,010,453,880.25/478,611
6. Step 6: Final answer
   x = 1,015,460.27