Finding the Third Proportional to 3,676,390 and 8,078,458

Step by Step Solution

1. Step 1: Write the proportion equation
   3,676,390 : 8,078,458 = 8,078,458 : x
2. Step 2: Convert to fraction form
   3,676,390/8,078,458 = 8,078,458/x
3. Step 3: Cross multiply
   3,676,390x = 8,078,458 × 8,078,458
4. Step 4: Simplify right side
   3,676,390x = 65,261,483,657,764
5. Step 5: Solve for x
   x = 65,261,483,657,764/3,676,390
6. Step 6: Final answer
   x = 17,751,512.67