Finding the Fourth Proportional to 8,768.27, 12,100.50 and 4,991.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,768.27 : 12,100.50 = 4,991.78 : x
2. Step 2: Convert to fraction form
   8,768.27/12,100.50 = 4,991.78/x
3. Step 3: Cross multiply
   8,768.27x = 12,100.50 × 4,991.78
4. Step 4: Simplify right side
   8,768.27x = 60,402,973.39
5. Step 5: Solve for x
   x = 60,402,973.39/8,768.27
6. Step 6: Final answer
   x = 6,888.82