Finding the Fourth Proportional to 8,813.43, 12,162.15 and 5,278.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,813.43 : 12,162.15 = 5,278.59 : x
2. Step 2: Convert to fraction form
   8,813.43/12,162.15 = 5,278.59/x
3. Step 3: Cross multiply
   8,813.43x = 12,162.15 × 5,278.59
4. Step 4: Simplify right side
   8,813.43x = 64,199,003.37
5. Step 5: Solve for x
   x = 64,199,003.37/8,813.43
6. Step 6: Final answer
   x = 7,284.22