Finding the Fourth Proportional to 12,269.85, 18,406.51 and 3,947.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,269.85 : 18,406.51 = 3,947.93 : x
2. Step 2: Convert to fraction form
   12,269.85/18,406.51 = 3,947.93/x
3. Step 3: Cross multiply
   12,269.85x = 18,406.51 × 3,947.93
4. Step 4: Simplify right side
   12,269.85x = 72,667,613.02
5. Step 5: Solve for x
   x = 72,667,613.02/12,269.85
6. Step 6: Final answer
   x = 5,922.45