Finding the Fourth Proportional to 8,958.57, 12,362.91 and 4,980.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,958.57 : 12,362.91 = 4,980.12 : x
2. Step 2: Convert to fraction form
   8,958.57/12,362.91 = 4,980.12/x
3. Step 3: Cross multiply
   8,958.57x = 12,362.91 × 4,980.12
4. Step 4: Simplify right side
   8,958.57x = 61,568,775.35
5. Step 5: Solve for x
   x = 61,568,775.35/8,958.57
6. Step 6: Final answer
   x = 6,872.61