Finding the Fourth Proportional to 8,856.56, 12,219.54 and 5,714.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856.56 : 12,219.54 = 5,714.57 : x
2. Step 2: Convert to fraction form
   8,856.56/12,219.54 = 5,714.57/x
3. Step 3: Cross multiply
   8,856.56x = 12,219.54 × 5,714.57
4. Step 4: Simplify right side
   8,856.56x = 69,829,416.70
5. Step 5: Solve for x
   x = 69,829,416.70/8,856.56
6. Step 6: Final answer
   x = 7,884.49