Finding the Fourth Proportional to 8,123.43, 12,162.65 and 4,166.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.43 : 12,162.65 = 4,166.15 : x
2. Step 2: Convert to fraction form
   8,123.43/12,162.65 = 4,166.15/x
3. Step 3: Cross multiply
   8,123.43x = 12,162.65 × 4,166.15
4. Step 4: Simplify right side
   8,123.43x = 50,671,424.30
5. Step 5: Solve for x
   x = 50,671,424.30/8,123.43
6. Step 6: Final answer
   x = 6,237.69