Finding the Fourth Proportional to 6,911.72, 10,354.78 and 4,315.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,911.72 : 10,354.78 = 4,315.88 : x
2. Step 2: Convert to fraction form
   6,911.72/10,354.78 = 4,315.88/x
3. Step 3: Cross multiply
   6,911.72x = 10,354.78 × 4,315.88
4. Step 4: Simplify right side
   6,911.72x = 44,689,987.91
5. Step 5: Solve for x
   x = 44,689,987.91/6,911.72
6. Step 6: Final answer
   x = 6,465.83