Finding the Fourth Proportional to 12,815.74, 17,684.76 and 8,348.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.74 : 17,684.76 = 8,348.05 : x
2. Step 2: Convert to fraction form
   12,815.74/17,684.76 = 8,348.05/x
3. Step 3: Cross multiply
   12,815.74x = 17,684.76 × 8,348.05
4. Step 4: Simplify right side
   12,815.74x = 147,633,260.72
5. Step 5: Solve for x
   x = 147,633,260.72/12,815.74
6. Step 6: Final answer
   x = 11,519.68