Finding the Third Proportional to 1,999,200 and 4,353,360

Step by Step Solution

1. Step 1: Write the proportion equation
   1,999,200 : 4,353,360 = 4,353,360 : x
2. Step 2: Convert to fraction form
   1,999,200/4,353,360 = 4,353,360/x
3. Step 3: Cross multiply
   1,999,200x = 4,353,360 × 4,353,360
4. Step 4: Simplify right side
   1,999,200x = 18,951,743,289,600
5. Step 5: Solve for x
   x = 18,951,743,289,600/1,999,200
6. Step 6: Final answer
   x = 9,479,663.51