Finding the Third Proportional to 5,418,620 and 7,430,406

Step by Step Solution

1. Step 1: Write the proportion equation
   5,418,620 : 7,430,406 = 7,430,406 : x
2. Step 2: Convert to fraction form
   5,418,620/7,430,406 = 7,430,406/x
3. Step 3: Cross multiply
   5,418,620x = 7,430,406 × 7,430,406
4. Step 4: Simplify right side
   5,418,620x = 55,210,933,324,836
5. Step 5: Solve for x
   x = 55,210,933,324,836/5,418,620
6. Step 6: Final answer
   x = 10,189,113.34