Finding the Fourth Proportional to 6,900.72, 9,519.49 and 4,512.09

Step by Step Solution

1. Step 1: Write the proportion equation
   6,900.72 : 9,519.49 = 4,512.09 : x
2. Step 2: Convert to fraction form
   6,900.72/9,519.49 = 4,512.09/x
3. Step 3: Cross multiply
   6,900.72x = 9,519.49 × 4,512.09
4. Step 4: Simplify right side
   6,900.72x = 42,952,808.15
5. Step 5: Solve for x
   x = 42,952,808.15/6,900.72
6. Step 6: Final answer
   x = 6,224.40