Finding the Third Proportional to 5,390,471 and 8,141,844

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390,471 : 8,141,844 = 8,141,844 : x
2. Step 2: Convert to fraction form
   5,390,471/8,141,844 = 8,141,844/x
3. Step 3: Cross multiply
   5,390,471x = 8,141,844 × 8,141,844
4. Step 4: Simplify right side
   5,390,471x = 66,289,623,720,336
5. Step 5: Solve for x
   x = 66,289,623,720,336/5,390,471
6. Step 6: Final answer
   x = 12,297,556.88