Finding the Third Proportional to 1,039,828 and 1,390,848

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,828 : 1,390,848 = 1,390,848 : x
2. Step 2: Convert to fraction form
   1,039,828/1,390,848 = 1,390,848/x
3. Step 3: Cross multiply
   1,039,828x = 1,390,848 × 1,390,848
4. Step 4: Simplify right side
   1,039,828x = 1,934,458,159,104
5. Step 5: Solve for x
   x = 1,934,458,159,104/1,039,828
6. Step 6: Final answer
   x = 1,860,363.60