Finding the Fourth Proportional to 6,209.21, 8,562.83 and 3,971.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,209.21 : 8,562.83 = 3,971.79 : x
2. Step 2: Convert to fraction form
   6,209.21/8,562.83 = 3,971.79/x
3. Step 3: Cross multiply
   6,209.21x = 8,562.83 × 3,971.79
4. Step 4: Simplify right side
   6,209.21x = 34,009,742.71
5. Step 5: Solve for x
   x = 34,009,742.71/6,209.21
6. Step 6: Final answer
   x = 5,477.31