Finding the Third Proportional to 2,139,690 and 4,699,220

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,690 : 4,699,220 = 4,699,220 : x
2. Step 2: Convert to fraction form
   2,139,690/4,699,220 = 4,699,220/x
3. Step 3: Cross multiply
   2,139,690x = 4,699,220 × 4,699,220
4. Step 4: Simplify right side
   2,139,690x = 22,082,668,608,400
5. Step 5: Solve for x
   x = 22,082,668,608,400/2,139,690
6. Step 6: Final answer
   x = 10,320,499.05