Finding the Fourth Proportional to 12,819.36, 17,681.52 and 8,334.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,819.36 : 17,681.52 = 8,334.72 : x
2. Step 2: Convert to fraction form
   12,819.36/17,681.52 = 8,334.72/x
3. Step 3: Cross multiply
   12,819.36x = 17,681.52 × 8,334.72
4. Step 4: Simplify right side
   12,819.36x = 147,370,518.37
5. Step 5: Solve for x
   x = 147,370,518.37/12,819.36
6. Step 6: Final answer
   x = 11,495.93