Finding the Fourth Proportional to 14,159.64, 19,540.81 and 7,786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,159.64 : 19,540.81 = 7,786.72 : x
2. Step 2: Convert to fraction form
   14,159.64/19,540.81 = 7,786.72/x
3. Step 3: Cross multiply
   14,159.64x = 19,540.81 × 7,786.72
4. Step 4: Simplify right side
   14,159.64x = 152,158,747.72
5. Step 5: Solve for x
   x = 152,158,747.72/14,159.64
6. Step 6: Final answer
   x = 10,745.95