Finding the Third Proportional to 2,415,405 and 5,209,123

Step by Step Solution

1. Step 1: Write the proportion equation
   2,415,405 : 5,209,123 = 5,209,123 : x
2. Step 2: Convert to fraction form
   2,415,405/5,209,123 = 5,209,123/x
3. Step 3: Cross multiply
   2,415,405x = 5,209,123 × 5,209,123
4. Step 4: Simplify right side
   2,415,405x = 27,134,962,429,129
5. Step 5: Solve for x
   x = 27,134,962,429,129/2,415,405
6. Step 6: Final answer
   x = 11,234,125.30