Finding the Fourth Proportional to 12,287.90, 18,434.59 and 3,966.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,287.90 : 18,434.59 = 3,966.37 : x
2. Step 2: Convert to fraction form
   12,287.90/18,434.59 = 3,966.37/x
3. Step 3: Cross multiply
   12,287.90x = 18,434.59 × 3,966.37
4. Step 4: Simplify right side
   12,287.90x = 73,118,348.74
5. Step 5: Solve for x
   x = 73,118,348.74/12,287.90
6. Step 6: Final answer
   x = 5,950.43