Finding the Third Proportional to 1,638,391 and 2,543,852

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,391 : 2,543,852 = 2,543,852 : x
2. Step 2: Convert to fraction form
   1,638,391/2,543,852 = 2,543,852/x
3. Step 3: Cross multiply
   1,638,391x = 2,543,852 × 2,543,852
4. Step 4: Simplify right side
   1,638,391x = 6,471,182,997,904
5. Step 5: Solve for x
   x = 6,471,182,997,904/1,638,391
6. Step 6: Final answer
   x = 3,949,718.35