Finding the Fourth Proportional to 8,768.79, 12,100.77 and 4,789.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,768.79 : 12,100.77 = 4,789.80 : x
2. Step 2: Convert to fraction form
   8,768.79/12,100.77 = 4,789.80/x
3. Step 3: Cross multiply
   8,768.79x = 12,100.77 × 4,789.80
4. Step 4: Simplify right side
   8,768.79x = 57,960,268.15
5. Step 5: Solve for x
   x = 57,960,268.15/8,768.79
6. Step 6: Final answer
   x = 6,609.84