Finding the Third Proportional to 1,339,644 and 1,873,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339,644 : 1,873,840 = 1,873,840 : x
2. Step 2: Convert to fraction form
   1,339,644/1,873,840 = 1,873,840/x
3. Step 3: Cross multiply
   1,339,644x = 1,873,840 × 1,873,840
4. Step 4: Simplify right side
   1,339,644x = 3,511,276,345,600
5. Step 5: Solve for x
   x = 3,511,276,345,600/1,339,644
6. Step 6: Final answer
   x = 2,621,051.82