Finding the Fourth Proportional to 3,720.72, 5,134.43 and 2,229.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,720.72 : 5,134.43 = 2,229.47 : x
2. Step 2: Convert to fraction form
   3,720.72/5,134.43 = 2,229.47/x
3. Step 3: Cross multiply
   3,720.72x = 5,134.43 × 2,229.47
4. Step 4: Simplify right side
   3,720.72x = 11,447,020.83
5. Step 5: Solve for x
   x = 11,447,020.83/3,720.72
6. Step 6: Final answer
   x = 3,076.56