Finding the Third Proportional to 3,216,617 and 7,072,931

Step by Step Solution

1. Step 1: Write the proportion equation
   3,216,617 : 7,072,931 = 7,072,931 : x
2. Step 2: Convert to fraction form
   3,216,617/7,072,931 = 7,072,931/x
3. Step 3: Cross multiply
   3,216,617x = 7,072,931 × 7,072,931
4. Step 4: Simplify right side
   3,216,617x = 50,026,352,930,761
5. Step 5: Solve for x
   x = 50,026,352,930,761/3,216,617
6. Step 6: Final answer
   x = 15,552,474.21