Finding the Fourth Proportional to 10,712.72, 16,064.76 and 3,315.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,712.72 : 16,064.76 = 3,315.44 : x
2. Step 2: Convert to fraction form
   10,712.72/16,064.76 = 3,315.44/x
3. Step 3: Cross multiply
   10,712.72x = 16,064.76 × 3,315.44
4. Step 4: Simplify right side
   10,712.72x = 53,261,747.89
5. Step 5: Solve for x
   x = 53,261,747.89/10,712.72
6. Step 6: Final answer
   x = 4,971.82