Finding the Fourth Proportional to 8,856.59, 12,221.91 and 4,877.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856.59 : 12,221.91 = 4,877.60 : x
2. Step 2: Convert to fraction form
   8,856.59/12,221.91 = 4,877.60/x
3. Step 3: Cross multiply
   8,856.59x = 12,221.91 × 4,877.60
4. Step 4: Simplify right side
   8,856.59x = 59,613,527.11
5. Step 5: Solve for x
   x = 59,613,527.11/8,856.59
6. Step 6: Final answer
   x = 6,730.98