Finding the Fourth Proportional to 12,106.72, 18,163.32 and 4,713.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,106.72 : 18,163.32 = 4,713.31 : x
2. Step 2: Convert to fraction form
   12,106.72/18,163.32 = 4,713.31/x
3. Step 3: Cross multiply
   12,106.72x = 18,163.32 × 4,713.31
4. Step 4: Simplify right side
   12,106.72x = 85,609,357.79
5. Step 5: Solve for x
   x = 85,609,357.79/12,106.72
6. Step 6: Final answer
   x = 7,071.23