Finding the Fourth Proportional to 12,190.39, 18,287.86 and 3,868.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,190.39 : 18,287.86 = 3,868.16 : x
2. Step 2: Convert to fraction form
   12,190.39/18,287.86 = 3,868.16/x
3. Step 3: Cross multiply
   12,190.39x = 18,287.86 × 3,868.16
4. Step 4: Simplify right side
   12,190.39x = 70,740,404.59
5. Step 5: Solve for x
   x = 70,740,404.59/12,190.39
6. Step 6: Final answer
   x = 5,802.97