Finding the Fourth Proportional to 3,886.54, 5,820.49 and 3,419.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.54 : 5,820.49 = 3,419.58 : x
2. Step 2: Convert to fraction form
   3,886.54/5,820.49 = 3,419.58/x
3. Step 3: Cross multiply
   3,886.54x = 5,820.49 × 3,419.58
4. Step 4: Simplify right side
   3,886.54x = 19,903,631.19
5. Step 5: Solve for x
   x = 19,903,631.19/3,886.54
6. Step 6: Final answer
   x = 5,121.17