Finding the Third Proportional to 1,578,321 and 3,451,887

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,321 : 3,451,887 = 3,451,887 : x
2. Step 2: Convert to fraction form
   1,578,321/3,451,887 = 3,451,887/x
3. Step 3: Cross multiply
   1,578,321x = 3,451,887 × 3,451,887
4. Step 4: Simplify right side
   1,578,321x = 11,915,523,860,769
5. Step 5: Solve for x
   x = 11,915,523,860,769/1,578,321
6. Step 6: Final answer
   x = 7,549,493.33