Finding the Third Proportional to 3,405,984 and 5,123,184

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405,984 : 5,123,184 = 5,123,184 : x
2. Step 2: Convert to fraction form
   3,405,984/5,123,184 = 5,123,184/x
3. Step 3: Cross multiply
   3,405,984x = 5,123,184 × 5,123,184
4. Step 4: Simplify right side
   3,405,984x = 26,247,014,297,856
5. Step 5: Solve for x
   x = 26,247,014,297,856/3,405,984
6. Step 6: Final answer
   x = 7,706,147.27