Finding the Fourth Proportional to 12,409.81, 18,618.18 and 5,019.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,409.81 : 18,618.18 = 5,019.45 : x
2. Step 2: Convert to fraction form
   12,409.81/18,618.18 = 5,019.45/x
3. Step 3: Cross multiply
   12,409.81x = 18,618.18 × 5,019.45
4. Step 4: Simplify right side
   12,409.81x = 93,453,023.60
5. Step 5: Solve for x
   x = 93,453,023.60/12,409.81
6. Step 6: Final answer
   x = 7,530.58