Finding the Third Proportional to 1,800,396 and 3,909,888

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800,396 : 3,909,888 = 3,909,888 : x
2. Step 2: Convert to fraction form
   1,800,396/3,909,888 = 3,909,888/x
3. Step 3: Cross multiply
   1,800,396x = 3,909,888 × 3,909,888
4. Step 4: Simplify right side
   1,800,396x = 15,287,224,172,544
5. Step 5: Solve for x
   x = 15,287,224,172,544/1,800,396
6. Step 6: Final answer
   x = 8,491,034.29