Finding the Third Proportional to 1,987,786 and 4,290,308

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,786 : 4,290,308 = 4,290,308 : x
2. Step 2: Convert to fraction form
   1,987,786/4,290,308 = 4,290,308/x
3. Step 3: Cross multiply
   1,987,786x = 4,290,308 × 4,290,308
4. Step 4: Simplify right side
   1,987,786x = 18,406,742,734,864
5. Step 5: Solve for x
   x = 18,406,742,734,864/1,987,786
6. Step 6: Final answer
   x = 9,259,921.71