Finding the Fourth Proportional to 11,429.56, 15,768.57 and 8,078.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,429.56 : 15,768.57 = 8,078.05 : x
2. Step 2: Convert to fraction form
   11,429.56/15,768.57 = 8,078.05/x
3. Step 3: Cross multiply
   11,429.56x = 15,768.57 × 8,078.05
4. Step 4: Simplify right side
   11,429.56x = 127,379,296.89
5. Step 5: Solve for x
   x = 127,379,296.89/11,429.56
6. Step 6: Final answer
   x = 11,144.72