Finding the Fourth Proportional to 8,786.25, 12,123.07 and 5,383.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.25 : 12,123.07 = 5,383.98 : x
2. Step 2: Convert to fraction form
   8,786.25/12,123.07 = 5,383.98/x
3. Step 3: Cross multiply
   8,786.25x = 12,123.07 × 5,383.98
4. Step 4: Simplify right side
   8,786.25x = 65,270,352.96
5. Step 5: Solve for x
   x = 65,270,352.96/8,786.25
6. Step 6: Final answer
   x = 7,428.69