Finding the Fourth Proportional to 8,658.12, 12,984.00 and 3,109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,658.12 : 12,984.00 = 3,109.98 : x
2. Step 2: Convert to fraction form
   8,658.12/12,984.00 = 3,109.98/x
3. Step 3: Cross multiply
   8,658.12x = 12,984.00 × 3,109.98
4. Step 4: Simplify right side
   8,658.12x = 40,379,944.31
5. Step 5: Solve for x
   x = 40,379,944.31/8,658.12
6. Step 6: Final answer
   x = 4,663.82