Finding the Third Proportional to 5,211,715 and 7,858,584

Step by Step Solution

1. Step 1: Write the proportion equation
   5,211,715 : 7,858,584 = 7,858,584 : x
2. Step 2: Convert to fraction form
   5,211,715/7,858,584 = 7,858,584/x
3. Step 3: Cross multiply
   5,211,715x = 7,858,584 × 7,858,584
4. Step 4: Simplify right side
   5,211,715x = 61,757,342,485,056
5. Step 5: Solve for x
   x = 61,757,342,485,056/5,211,715
6. Step 6: Final answer
   x = 11,849,715.97