Finding the Fourth Proportional to 5,419.41, 8,120.86 and 3,862.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.41 : 8,120.86 = 3,862.69 : x
2. Step 2: Convert to fraction form
   5,419.41/8,120.86 = 3,862.69/x
3. Step 3: Cross multiply
   5,419.41x = 8,120.86 × 3,862.69
4. Step 4: Simplify right side
   5,419.41x = 31,368,334.75
5. Step 5: Solve for x
   x = 31,368,334.75/5,419.41
6. Step 6: Final answer
   x = 5,788.15