Finding the Fourth Proportional to 5,858.31, 8,087.40 and 3,979.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,858.31 : 8,087.40 = 3,979.83 : x
2. Step 2: Convert to fraction form
   5,858.31/8,087.40 = 3,979.83/x
3. Step 3: Cross multiply
   5,858.31x = 8,087.40 × 3,979.83
4. Step 4: Simplify right side
   5,858.31x = 32,186,477.14
5. Step 5: Solve for x
   x = 32,186,477.14/5,858.31
6. Step 6: Final answer
   x = 5,494.16