Finding the Third Proportional to 728,118 and 1,139,702

Step by Step Solution

1. Step 1: Write the proportion equation
   728,118 : 1,139,702 = 1,139,702 : x
2. Step 2: Convert to fraction form
   728,118/1,139,702 = 1,139,702/x
3. Step 3: Cross multiply
   728,118x = 1,139,702 × 1,139,702
4. Step 4: Simplify right side
   728,118x = 1,298,920,648,804
5. Step 5: Solve for x
   x = 1,298,920,648,804/728,118
6. Step 6: Final answer
   x = 1,783,942.50