Finding the Third Proportional to 2,121,819 and 4,341,684

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121,819 : 4,341,684 = 4,341,684 : x
2. Step 2: Convert to fraction form
   2,121,819/4,341,684 = 4,341,684/x
3. Step 3: Cross multiply
   2,121,819x = 4,341,684 × 4,341,684
4. Step 4: Simplify right side
   2,121,819x = 18,850,219,955,856
5. Step 5: Solve for x
   x = 18,850,219,955,856/2,121,819
6. Step 6: Final answer
   x = 8,883,990.56