Finding the Third Proportional to 4,558,740 and 7,218,648

Step by Step Solution

1. Step 1: Write the proportion equation
   4,558,740 : 7,218,648 = 7,218,648 : x
2. Step 2: Convert to fraction form
   4,558,740/7,218,648 = 7,218,648/x
3. Step 3: Cross multiply
   4,558,740x = 7,218,648 × 7,218,648
4. Step 4: Simplify right side
   4,558,740x = 52,108,878,947,904
5. Step 5: Solve for x
   x = 52,108,878,947,904/4,558,740
6. Step 6: Final answer
   x = 11,430,544.17