Finding the Fourth Proportional to 6,109.81, 8,429.60 and 3,591.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.81 : 8,429.60 = 3,591.12 : x
2. Step 2: Convert to fraction form
   6,109.81/8,429.60 = 3,591.12/x
3. Step 3: Cross multiply
   6,109.81x = 8,429.60 × 3,591.12
4. Step 4: Simplify right side
   6,109.81x = 30,271,705.15
5. Step 5: Solve for x
   x = 30,271,705.15/6,109.81
6. Step 6: Final answer
   x = 4,954.61