Finding the Third Proportional to 2,139,680 and 4,699,200

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,680 : 4,699,200 = 4,699,200 : x
2. Step 2: Convert to fraction form
   2,139,680/4,699,200 = 4,699,200/x
3. Step 3: Cross multiply
   2,139,680x = 4,699,200 × 4,699,200
4. Step 4: Simplify right side
   2,139,680x = 22,082,480,640,000
5. Step 5: Solve for x
   x = 22,082,480,640,000/2,139,680
6. Step 6: Final answer
   x = 10,320,459.43