Finding the Fourth Proportional to 8,751.35, 12,078.81 and 5,564.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,751.35 : 12,078.81 = 5,564.03 : x
2. Step 2: Convert to fraction form
   8,751.35/12,078.81 = 5,564.03/x
3. Step 3: Cross multiply
   8,751.35x = 12,078.81 × 5,564.03
4. Step 4: Simplify right side
   8,751.35x = 67,206,800.81
5. Step 5: Solve for x
   x = 67,206,800.81/8,751.35
6. Step 6: Final answer
   x = 7,679.60