Finding the Fourth Proportional to 8,366.56, 12,496.81 and 7,886.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,366.56 : 12,496.81 = 7,886.72 : x
2. Step 2: Convert to fraction form
   8,366.56/12,496.81 = 7,886.72/x
3. Step 3: Cross multiply
   8,366.56x = 12,496.81 × 7,886.72
4. Step 4: Simplify right side
   8,366.56x = 98,558,841.36
5. Step 5: Solve for x
   x = 98,558,841.36/8,366.56
6. Step 6: Final answer
   x = 11,780.09