Finding the Fourth Proportional to 8,856.50, 12,221.74 and 4,877.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856.50 : 12,221.74 = 4,877.57 : x
2. Step 2: Convert to fraction form
   8,856.50/12,221.74 = 4,877.57/x
3. Step 3: Cross multiply
   8,856.50x = 12,221.74 × 4,877.57
4. Step 4: Simplify right side
   8,856.50x = 59,612,392.37
5. Step 5: Solve for x
   x = 59,612,392.37/8,856.50
6. Step 6: Final answer
   x = 6,730.92