Finding the Fourth Proportional to 12,101.70, 18,141.57 and 4,308.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,101.70 : 18,141.57 = 4,308.69 : x
2. Step 2: Convert to fraction form
   12,101.70/18,141.57 = 4,308.69/x
3. Step 3: Cross multiply
   12,101.70x = 18,141.57 × 4,308.69
4. Step 4: Simplify right side
   12,101.70x = 78,166,469.27
5. Step 5: Solve for x
   x = 78,166,469.27/12,101.70
6. Step 6: Final answer
   x = 6,459.13