Finding the Third Proportional to 4,154,298 and 8,638,818

Step by Step Solution

1. Step 1: Write the proportion equation
   4,154,298 : 8,638,818 = 8,638,818 : x
2. Step 2: Convert to fraction form
   4,154,298/8,638,818 = 8,638,818/x
3. Step 3: Cross multiply
   4,154,298x = 8,638,818 × 8,638,818
4. Step 4: Simplify right side
   4,154,298x = 74,629,176,437,124
5. Step 5: Solve for x
   x = 74,629,176,437,124/4,154,298
6. Step 6: Final answer
   x = 17,964,329.10