Finding the Fourth Proportional to 8,785.37, 12,131.94 and 5,647.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,785.37 : 12,131.94 = 5,647.07 : x
2. Step 2: Convert to fraction form
   8,785.37/12,131.94 = 5,647.07/x
3. Step 3: Cross multiply
   8,785.37x = 12,131.94 × 5,647.07
4. Step 4: Simplify right side
   8,785.37x = 68,509,853.76
5. Step 5: Solve for x
   x = 68,509,853.76/8,785.37
6. Step 6: Final answer
   x = 7,798.18