Finding the Third Proportional to 3,670,399 and 8,087,290

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670,399 : 8,087,290 = 8,087,290 : x
2. Step 2: Convert to fraction form
   3,670,399/8,087,290 = 8,087,290/x
3. Step 3: Cross multiply
   3,670,399x = 8,087,290 × 8,087,290
4. Step 4: Simplify right side
   3,670,399x = 65,404,259,544,100
5. Step 5: Solve for x
   x = 65,404,259,544,100/3,670,399
6. Step 6: Final answer
   x = 17,819,386.81