Finding the Third Proportional to 3,405,208 and 5,078,278

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405,208 : 5,078,278 = 5,078,278 : x
2. Step 2: Convert to fraction form
   3,405,208/5,078,278 = 5,078,278/x
3. Step 3: Cross multiply
   3,405,208x = 5,078,278 × 5,078,278
4. Step 4: Simplify right side
   3,405,208x = 25,788,907,445,284
5. Step 5: Solve for x
   x = 25,788,907,445,284/3,405,208
6. Step 6: Final answer
   x = 7,573,372.15