Finding the Fourth Proportional to 3,820.62, 5,721.18 and 3,499.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.62 : 5,721.18 = 3,499.86 : x
2. Step 2: Convert to fraction form
   3,820.62/5,721.18 = 3,499.86/x
3. Step 3: Cross multiply
   3,820.62x = 5,721.18 × 3,499.86
4. Step 4: Simplify right side
   3,820.62x = 20,023,329.03
5. Step 5: Solve for x
   x = 20,023,329.03/3,820.62
6. Step 6: Final answer
   x = 5,240.86