Finding the Fourth Proportional to 8,786.02, 12,128.67 and 5,603.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.02 : 12,128.67 = 5,603.59 : x
2. Step 2: Convert to fraction form
   8,786.02/12,128.67 = 5,603.59/x
3. Step 3: Cross multiply
   8,786.02x = 12,128.67 × 5,603.59
4. Step 4: Simplify right side
   8,786.02x = 67,964,093.93
5. Step 5: Solve for x
   x = 67,964,093.93/8,786.02
6. Step 6: Final answer
   x = 7,735.48