Finding the Fourth Proportional to 10,390.24, 15,589.20 and 3,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.24 : 15,589.20 = 3,820.72 : x
2. Step 2: Convert to fraction form
   10,390.24/15,589.20 = 3,820.72/x
3. Step 3: Cross multiply
   10,390.24x = 15,589.20 × 3,820.72
4. Step 4: Simplify right side
   10,390.24x = 59,561,968.22
5. Step 5: Solve for x
   x = 59,561,968.22/10,390.24
6. Step 6: Final answer
   x = 5,732.49