Finding the Fourth Proportional to 12,401.60, 18,573.60 and 12,113.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.60 : 18,573.60 = 12,113.60 : x
2. Step 2: Convert to fraction form
   12,401.60/18,573.60 = 12,113.60/x
3. Step 3: Cross multiply
   12,401.60x = 18,573.60 × 12,113.60
4. Step 4: Simplify right side
   12,401.60x = 224,993,160.96
5. Step 5: Solve for x
   x = 224,993,160.96/12,401.60
6. Step 6: Final answer
   x = 18,142.27