Finding the Fourth Proportional to 3,820.86, 5,757.32 and 3,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.86 : 5,757.32 = 3,142.72 : x
2. Step 2: Convert to fraction form
   3,820.86/5,757.32 = 3,142.72/x
3. Step 3: Cross multiply
   3,820.86x = 5,757.32 × 3,142.72
4. Step 4: Simplify right side
   3,820.86x = 18,093,644.71
5. Step 5: Solve for x
   x = 18,093,644.71/3,820.86
6. Step 6: Final answer
   x = 4,735.49