Finding the Fourth Proportional to 8,472.15, 12,691.22 and 4,768.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,472.15 : 12,691.22 = 4,768.83 : x
2. Step 2: Convert to fraction form
   8,472.15/12,691.22 = 4,768.83/x
3. Step 3: Cross multiply
   8,472.15x = 12,691.22 × 4,768.83
4. Step 4: Simplify right side
   8,472.15x = 60,522,246.83
5. Step 5: Solve for x
   x = 60,522,246.83/8,472.15
6. Step 6: Final answer
   x = 7,143.67