Finding the Fourth Proportional to 12,977.82, 19,466.46 and 4,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.82 : 19,466.46 = 4,212.72 : x
2. Step 2: Convert to fraction form
   12,977.82/19,466.46 = 4,212.72/x
3. Step 3: Cross multiply
   12,977.82x = 19,466.46 × 4,212.72
4. Step 4: Simplify right side
   12,977.82x = 82,006,745.37
5. Step 5: Solve for x
   x = 82,006,745.37/12,977.82
6. Step 6: Final answer
   x = 6,318.99