Finding the Fourth Proportional to 12,409.50, 18,621.81 and 5,013.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,409.50 : 18,621.81 = 5,013.18 : x
2. Step 2: Convert to fraction form
   12,409.50/18,621.81 = 5,013.18/x
3. Step 3: Cross multiply
   12,409.50x = 18,621.81 × 5,013.18
4. Step 4: Simplify right side
   12,409.50x = 93,354,485.46
5. Step 5: Solve for x
   x = 93,354,485.46/12,409.50
6. Step 6: Final answer
   x = 7,522.82