Finding the Fourth Proportional to 13,205.82, 19,810.56 and 5,412.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,205.82 : 19,810.56 = 5,412.81 : x
2. Step 2: Convert to fraction form
   13,205.82/19,810.56 = 5,412.81/x
3. Step 3: Cross multiply
   13,205.82x = 19,810.56 × 5,412.81
4. Step 4: Simplify right side
   13,205.82x = 107,230,797.27
5. Step 5: Solve for x
   x = 107,230,797.27/13,205.82
6. Step 6: Final answer
   x = 8,119.97