Finding the Third Proportional to 551,008.50 and 851,078.25

Step by Step Solution

1. Step 1: Write the proportion equation
   551,008.50 : 851,078.25 = 851,078.25 : x
2. Step 2: Convert to fraction form
   551,008.50/851,078.25 = 851,078.25/x
3. Step 3: Cross multiply
   551,008.50x = 851,078.25 × 851,078.25
4. Step 4: Simplify right side
   551,008.50x = 724,334,187,623.06
5. Step 5: Solve for x
   x = 724,334,187,623.06/551,008.50
6. Step 6: Final answer
   x = 1,314,560.82