Finding the Third Proportional to 6,859.69 and 10,385.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,859.69 : 10,385.72 = 10,385.72 : x
2. Step 2: Convert to fraction form
   6,859.69/10,385.72 = 10,385.72/x
3. Step 3: Cross multiply
   6,859.69x = 10,385.72 × 10,385.72
4. Step 4: Simplify right side
   6,859.69x = 107,863,153.95
5. Step 5: Solve for x
   x = 107,863,153.95/6,859.69
6. Step 6: Final answer
   x = 15,724.21