Finding the Third Proportional to 545,859 and 800,968.50

Step by Step Solution

1. Step 1: Write the proportion equation
   545,859 : 800,968.50 = 800,968.50 : x
2. Step 2: Convert to fraction form
   545,859/800,968.50 = 800,968.50/x
3. Step 3: Cross multiply
   545,859x = 800,968.50 × 800,968.50
4. Step 4: Simplify right side
   545,859x = 641,550,537,992.25
5. Step 5: Solve for x
   x = 641,550,537,992.25/545,859
6. Step 6: Final answer
   x = 1,175,304.50