Finding the Third Proportional to 549,855 and 851,377.50

Step by Step Solution

1. Step 1: Write the proportion equation
   549,855 : 851,377.50 = 851,377.50 : x
2. Step 2: Convert to fraction form
   549,855/851,377.50 = 851,377.50/x
3. Step 3: Cross multiply
   549,855x = 851,377.50 × 851,377.50
4. Step 4: Simplify right side
   549,855x = 724,843,647,506.25
5. Step 5: Solve for x
   x = 724,843,647,506.25/549,855
6. Step 6: Final answer
   x = 1,318,245.08