Finding the Fourth Proportional to 12,404.60, 18,578.10 and 12,116.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.60 : 18,578.10 = 12,116.60 : x
2. Step 2: Convert to fraction form
   12,404.60/18,578.10 = 12,116.60/x
3. Step 3: Cross multiply
   12,404.60x = 18,578.10 × 12,116.60
4. Step 4: Simplify right side
   12,404.60x = 225,103,406.46
5. Step 5: Solve for x
   x = 225,103,406.46/12,404.60
6. Step 6: Final answer
   x = 18,146.77