Finding the Third Proportional to 5,578,370 and 8,619,843

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578,370 : 8,619,843 = 8,619,843 : x
2. Step 2: Convert to fraction form
   5,578,370/8,619,843 = 8,619,843/x
3. Step 3: Cross multiply
   5,578,370x = 8,619,843 × 8,619,843
4. Step 4: Simplify right side
   5,578,370x = 74,301,693,344,649
5. Step 5: Solve for x
   x = 74,301,693,344,649/5,578,370
6. Step 6: Final answer
   x = 13,319,606.51