Finding the Third Proportional to 5,539,826 and 8,509,851

Step by Step Solution

1. Step 1: Write the proportion equation
   5,539,826 : 8,509,851 = 8,509,851 : x
2. Step 2: Convert to fraction form
   5,539,826/8,509,851 = 8,509,851/x
3. Step 3: Cross multiply
   5,539,826x = 8,509,851 × 8,509,851
4. Step 4: Simplify right side
   5,539,826x = 72,417,564,042,201
5. Step 5: Solve for x
   x = 72,417,564,042,201/5,539,826
6. Step 6: Final answer
   x = 13,072,173.03