Finding the Third Proportional to 3,489,380 and 5,213,155

Step by Step Solution

1. Step 1: Write the proportion equation
   3,489,380 : 5,213,155 = 5,213,155 : x
2. Step 2: Convert to fraction form
   3,489,380/5,213,155 = 5,213,155/x
3. Step 3: Cross multiply
   3,489,380x = 5,213,155 × 5,213,155
4. Step 4: Simplify right side
   3,489,380x = 27,176,985,054,025
5. Step 5: Solve for x
   x = 27,176,985,054,025/3,489,380
6. Step 6: Final answer
   x = 7,788,485.36