Finding the Fourth Proportional to 8,811.84, 12,158.64 and 5,667.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,811.84 : 12,158.64 = 5,667.60 : x
2. Step 2: Convert to fraction form
   8,811.84/12,158.64 = 5,667.60/x
3. Step 3: Cross multiply
   8,811.84x = 12,158.64 × 5,667.60
4. Step 4: Simplify right side
   8,811.84x = 68,910,308.06
5. Step 5: Solve for x
   x = 68,910,308.06/8,811.84
6. Step 6: Final answer
   x = 7,820.20