Finding the Third Proportional to 4,558,912 and 7,218,928

Step by Step Solution

1. Step 1: Write the proportion equation
   4,558,912 : 7,218,928 = 7,218,928 : x
2. Step 2: Convert to fraction form
   4,558,912/7,218,928 = 7,218,928/x
3. Step 3: Cross multiply
   4,558,912x = 7,218,928 × 7,218,928
4. Step 4: Simplify right side
   4,558,912x = 52,112,921,469,184
5. Step 5: Solve for x
   x = 52,112,921,469,184/4,558,912
6. Step 6: Final answer
   x = 11,430,999.65