Finding the Fourth Proportional to 8,118.91, 12,186.56 and 5,166.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.91 : 12,186.56 = 5,166.46 : x
2. Step 2: Convert to fraction form
   8,118.91/12,186.56 = 5,166.46/x
3. Step 3: Cross multiply
   8,118.91x = 12,186.56 × 5,166.46
4. Step 4: Simplify right side
   8,118.91x = 62,961,357.23
5. Step 5: Solve for x
   x = 62,961,357.23/8,118.91
6. Step 6: Final answer
   x = 7,754.91