Finding the Fourth Proportional to 12,416.95, 18,626.71 and 3,980.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,416.95 : 18,626.71 = 3,980.49 : x
2. Step 2: Convert to fraction form
   12,416.95/18,626.71 = 3,980.49/x
3. Step 3: Cross multiply
   12,416.95x = 18,626.71 × 3,980.49
4. Step 4: Simplify right side
   12,416.95x = 74,143,339.75
5. Step 5: Solve for x
   x = 74,143,339.75/12,416.95
6. Step 6: Final answer
   x = 5,971.14