Finding the Fourth Proportional to 8,756.78, 12,084.53 and 4,778.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,756.78 : 12,084.53 = 4,778.06 : x
2. Step 2: Convert to fraction form
   8,756.78/12,084.53 = 4,778.06/x
3. Step 3: Cross multiply
   8,756.78x = 12,084.53 × 4,778.06
4. Step 4: Simplify right side
   8,756.78x = 57,740,525.10
5. Step 5: Solve for x
   x = 57,740,525.10/8,756.78
6. Step 6: Final answer
   x = 6,593.81