Finding the Third Proportional to 5,578,654 and 8,620,444

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578,654 : 8,620,444 = 8,620,444 : x
2. Step 2: Convert to fraction form
   5,578,654/8,620,444 = 8,620,444/x
3. Step 3: Cross multiply
   5,578,654x = 8,620,444 × 8,620,444
4. Step 4: Simplify right side
   5,578,654x = 74,312,054,757,136
5. Step 5: Solve for x
   x = 74,312,054,757,136/5,578,654
6. Step 6: Final answer
   x = 13,320,785.76