Finding the Fourth Proportional to 8,921.16, 12,311.60 and 4,942.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,921.16 : 12,311.60 = 4,942.27 : x
2. Step 2: Convert to fraction form
   8,921.16/12,311.60 = 4,942.27/x
3. Step 3: Cross multiply
   8,921.16x = 12,311.60 × 4,942.27
4. Step 4: Simplify right side
   8,921.16x = 60,847,172.76
5. Step 5: Solve for x
   x = 60,847,172.76/8,921.16
6. Step 6: Final answer
   x = 6,820.54