Finding the Third Proportional to 678,888 and 1,413,558

Step by Step Solution

1. Step 1: Write the proportion equation
   678,888 : 1,413,558 = 1,413,558 : x
2. Step 2: Convert to fraction form
   678,888/1,413,558 = 1,413,558/x
3. Step 3: Cross multiply
   678,888x = 1,413,558 × 1,413,558
4. Step 4: Simplify right side
   678,888x = 1,998,146,219,364
5. Step 5: Solve for x
   x = 1,998,146,219,364/678,888
6. Step 6: Final answer
   x = 2,943,263.42