Finding the Third Proportional to 6,907.78 and 8,479.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,907.78 : 8,479.69 = 8,479.69 : x
2. Step 2: Convert to fraction form
   6,907.78/8,479.69 = 8,479.69/x
3. Step 3: Cross multiply
   6,907.78x = 8,479.69 × 8,479.69
4. Step 4: Simplify right side
   6,907.78x = 71,905,100.10
5. Step 5: Solve for x
   x = 71,905,100.10/6,907.78
6. Step 6: Final answer
   x = 10,409.29