Finding the Fourth Proportional to 3,818.86, 5,754.31 and 3,140.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818.86 : 5,754.31 = 3,140.72 : x
2. Step 2: Convert to fraction form
   3,818.86/5,754.31 = 3,140.72/x
3. Step 3: Cross multiply
   3,818.86x = 5,754.31 × 3,140.72
4. Step 4: Simplify right side
   3,818.86x = 18,072,632.03
5. Step 5: Solve for x
   x = 18,072,632.03/3,818.86
6. Step 6: Final answer
   x = 4,732.47