Finding the Fourth Proportional to 12,266.59, 18,398.13 and 3,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,266.59 : 18,398.13 = 3,945.50 : x
2. Step 2: Convert to fraction form
   12,266.59/18,398.13 = 3,945.50/x
3. Step 3: Cross multiply
   12,266.59x = 18,398.13 × 3,945.50
4. Step 4: Simplify right side
   12,266.59x = 72,589,853.11
5. Step 5: Solve for x
   x = 72,589,853.11/12,266.59
6. Step 6: Final answer
   x = 5,917.69