Finding the Fourth Proportional to 8,620.82, 12,932.43 and 3,072.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,620.82 : 12,932.43 = 3,072.52 : x
2. Step 2: Convert to fraction form
   8,620.82/12,932.43 = 3,072.52/x
3. Step 3: Cross multiply
   8,620.82x = 12,932.43 × 3,072.52
4. Step 4: Simplify right side
   8,620.82x = 39,735,149.82
5. Step 5: Solve for x
   x = 39,735,149.82/8,620.82
6. Step 6: Final answer
   x = 4,609.21