Finding the Fourth Proportional to 8,311.98, 12,472.02 and 3,385.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.98 : 12,472.02 = 3,385.02 : x
2. Step 2: Convert to fraction form
   8,311.98/12,472.02 = 3,385.02/x
3. Step 3: Cross multiply
   8,311.98x = 12,472.02 × 3,385.02
4. Step 4: Simplify right side
   8,311.98x = 42,218,037.14
5. Step 5: Solve for x
   x = 42,218,037.14/8,311.98
6. Step 6: Final answer
   x = 5,079.18