Finding the Third Proportional to 5,578,372 and 8,619,846

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578,372 : 8,619,846 = 8,619,846 : x
2. Step 2: Convert to fraction form
   5,578,372/8,619,846 = 8,619,846/x
3. Step 3: Cross multiply
   5,578,372x = 8,619,846 × 8,619,846
4. Step 4: Simplify right side
   5,578,372x = 74,301,745,063,716
5. Step 5: Solve for x
   x = 74,301,745,063,716/5,578,372
6. Step 6: Final answer
   x = 13,319,611.00