Finding the Third Proportional to 2,139,688 and 4,699,216

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,688 : 4,699,216 = 4,699,216 : x
2. Step 2: Convert to fraction form
   2,139,688/4,699,216 = 4,699,216/x
3. Step 3: Cross multiply
   2,139,688x = 4,699,216 × 4,699,216
4. Step 4: Simplify right side
   2,139,688x = 22,082,631,014,656
5. Step 5: Solve for x
   x = 22,082,631,014,656/2,139,688
6. Step 6: Final answer
   x = 10,320,491.13