Finding the Fourth Proportional to 12,471.36, 18,706.50 and 3,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,471.36 : 18,706.50 = 3,111.42 : x
2. Step 2: Convert to fraction form
   12,471.36/18,706.50 = 3,111.42/x
3. Step 3: Cross multiply
   12,471.36x = 18,706.50 × 3,111.42
4. Step 4: Simplify right side
   12,471.36x = 58,203,778.23
5. Step 5: Solve for x
   x = 58,203,778.23/12,471.36
6. Step 6: Final answer
   x = 4,667.00