Finding the Third Proportional to 1,039,824 and 1,390,842

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,824 : 1,390,842 = 1,390,842 : x
2. Step 2: Convert to fraction form
   1,039,824/1,390,842 = 1,390,842/x
3. Step 3: Cross multiply
   1,039,824x = 1,390,842 × 1,390,842
4. Step 4: Simplify right side
   1,039,824x = 1,934,441,468,964
5. Step 5: Solve for x
   x = 1,934,441,468,964/1,039,824
6. Step 6: Final answer
   x = 1,860,354.70