Finding the Third Proportional to 1,187,862 and 2,590,128

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,862 : 2,590,128 = 2,590,128 : x
2. Step 2: Convert to fraction form
   1,187,862/2,590,128 = 2,590,128/x
3. Step 3: Cross multiply
   1,187,862x = 2,590,128 × 2,590,128
4. Step 4: Simplify right side
   1,187,862x = 6,708,763,056,384
5. Step 5: Solve for x
   x = 6,708,763,056,384/1,187,862
6. Step 6: Final answer
   x = 5,647,763.00