Finding the Fourth Proportional to 12,407.72, 18,615.42 and 3,975.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.72 : 18,615.42 = 3,975.48 : x
2. Step 2: Convert to fraction form
   12,407.72/18,615.42 = 3,975.48/x
3. Step 3: Cross multiply
   12,407.72x = 18,615.42 × 3,975.48
4. Step 4: Simplify right side
   12,407.72x = 74,005,229.90
5. Step 5: Solve for x
   x = 74,005,229.90/12,407.72
6. Step 6: Final answer
   x = 5,964.45