Finding the Fourth Proportional to 12,638.72, 18,960.51 and 4,846.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.72 : 18,960.51 = 4,846.92 : x
2. Step 2: Convert to fraction form
   12,638.72/18,960.51 = 4,846.92/x
3. Step 3: Cross multiply
   12,638.72x = 18,960.51 × 4,846.92
4. Step 4: Simplify right side
   12,638.72x = 91,900,087.96
5. Step 5: Solve for x
   x = 91,900,087.96/12,638.72
6. Step 6: Final answer
   x = 7,271.31