Finding the Fourth Proportional to 12,391.89, 18,587.59 and 4,996.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.89 : 18,587.59 = 4,996.18 : x
2. Step 2: Convert to fraction form
   12,391.89/18,587.59 = 4,996.18/x
3. Step 3: Cross multiply
   12,391.89x = 18,587.59 × 4,996.18
4. Step 4: Simplify right side
   12,391.89x = 92,866,945.41
5. Step 5: Solve for x
   x = 92,866,945.41/12,391.89
6. Step 6: Final answer
   x = 7,494.17