Finding the Fourth Proportional to 14,159.77, 19,540.55 and 7,786.77

Step by Step Solution

1. Step 1: Write the proportion equation
   14,159.77 : 19,540.55 = 7,786.77 : x
2. Step 2: Convert to fraction form
   14,159.77/19,540.55 = 7,786.77/x
3. Step 3: Cross multiply
   14,159.77x = 19,540.55 × 7,786.77
4. Step 4: Simplify right side
   14,159.77x = 152,157,631.89
5. Step 5: Solve for x
   x = 152,157,631.89/14,159.77
6. Step 6: Final answer
   x = 10,745.77