Finding the Third Proportional to 3,216,615 and 7,072,928

Step by Step Solution

1. Step 1: Write the proportion equation
   3,216,615 : 7,072,928 = 7,072,928 : x
2. Step 2: Convert to fraction form
   3,216,615/7,072,928 = 7,072,928/x
3. Step 3: Cross multiply
   3,216,615x = 7,072,928 × 7,072,928
4. Step 4: Simplify right side
   3,216,615x = 50,026,310,493,184
5. Step 5: Solve for x
   x = 50,026,310,493,184/3,216,615
6. Step 6: Final answer
   x = 15,552,470.69