Finding the Fourth Proportional to 8,778.06, 12,105.09 and 5,754.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,778.06 : 12,105.09 = 5,754.15 : x
2. Step 2: Convert to fraction form
   8,778.06/12,105.09 = 5,754.15/x
3. Step 3: Cross multiply
   8,778.06x = 12,105.09 × 5,754.15
4. Step 4: Simplify right side
   8,778.06x = 69,654,503.62
5. Step 5: Solve for x
   x = 69,654,503.62/8,778.06
6. Step 6: Final answer
   x = 7,935.07