Finding the Fourth Proportional to 12,328.61, 18,498.98 and 7,647.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,328.61 : 18,498.98 = 7,647.41 : x
2. Step 2: Convert to fraction form
   12,328.61/18,498.98 = 7,647.41/x
3. Step 3: Cross multiply
   12,328.61x = 18,498.98 × 7,647.41
4. Step 4: Simplify right side
   12,328.61x = 141,469,350.01
5. Step 5: Solve for x
   x = 141,469,350.01/12,328.61
6. Step 6: Final answer
   x = 11,474.89