Finding the Fourth Proportional to 10,112.20, 15,174.57 and 3,872.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,112.20 : 15,174.57 = 3,872.72 : x
2. Step 2: Convert to fraction form
   10,112.20/15,174.57 = 3,872.72/x
3. Step 3: Cross multiply
   10,112.20x = 15,174.57 × 3,872.72
4. Step 4: Simplify right side
   10,112.20x = 58,766,860.73
5. Step 5: Solve for x
   x = 58,766,860.73/10,112.20
6. Step 6: Final answer
   x = 5,811.48