Finding the Third Proportional to 3,405,940 and 5,123,217

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405,940 : 5,123,217 = 5,123,217 : x
2. Step 2: Convert to fraction form
   3,405,940/5,123,217 = 5,123,217/x
3. Step 3: Cross multiply
   3,405,940x = 5,123,217 × 5,123,217
4. Step 4: Simplify right side
   3,405,940x = 26,247,352,429,089
5. Step 5: Solve for x
   x = 26,247,352,429,089/3,405,940
6. Step 6: Final answer
   x = 7,706,346.10