Finding the Third Proportional to 1,578,312 and 3,531,408

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,312 : 3,531,408 = 3,531,408 : x
2. Step 2: Convert to fraction form
   1,578,312/3,531,408 = 3,531,408/x
3. Step 3: Cross multiply
   1,578,312x = 3,531,408 × 3,531,408
4. Step 4: Simplify right side
   1,578,312x = 12,470,842,462,464
5. Step 5: Solve for x
   x = 12,470,842,462,464/1,578,312
6. Step 6: Final answer
   x = 7,901,379.74