Finding the Fourth Proportional to 6,615.42, 9,919.86 and 3,279.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,615.42 : 9,919.86 = 3,279.81 : x
2. Step 2: Convert to fraction form
   6,615.42/9,919.86 = 3,279.81/x
3. Step 3: Cross multiply
   6,615.42x = 9,919.86 × 3,279.81
4. Step 4: Simplify right side
   6,615.42x = 32,535,256.03
5. Step 5: Solve for x
   x = 32,535,256.03/6,615.42
6. Step 6: Final answer
   x = 4,918.09