Finding the Fourth Proportional to 7,011.89, 10,508.48 and 3,315.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,011.89 : 10,508.48 = 3,315.09 : x
2. Step 2: Convert to fraction form
   7,011.89/10,508.48 = 3,315.09/x
3. Step 3: Cross multiply
   7,011.89x = 10,508.48 × 3,315.09
4. Step 4: Simplify right side
   7,011.89x = 34,836,540.39
5. Step 5: Solve for x
   x = 34,836,540.39/7,011.89
6. Step 6: Final answer
   x = 4,968.21