Finding the Fourth Proportional to 13,654.66, 18,843.78 and 7,686.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,654.66 : 18,843.78 = 7,686.54 : x
2. Step 2: Convert to fraction form
   13,654.66/18,843.78 = 7,686.54/x
3. Step 3: Cross multiply
   13,654.66x = 18,843.78 × 7,686.54
4. Step 4: Simplify right side
   13,654.66x = 144,843,468.72
5. Step 5: Solve for x
   x = 144,843,468.72/13,654.66
6. Step 6: Final answer
   x = 10,607.62