Finding the Third Proportional to 489,888 and 719,249.63

Step by Step Solution

1. Step 1: Write the proportion equation
   489,888 : 719,249.63 = 719,249.63 : x
2. Step 2: Convert to fraction form
   489,888/719,249.63 = 719,249.63/x
3. Step 3: Cross multiply
   489,888x = 719,249.63 × 719,249.63
4. Step 4: Simplify right side
   489,888x = 517,320,023,062.64
5. Step 5: Solve for x
   x = 517,320,023,062.64/489,888
6. Step 6: Final answer
   x = 1,055,996.52