Finding the Fourth Proportional to 21,841.50, 30,140.19 and 12,409.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,841.50 : 30,140.19 = 12,409.86 : x
2. Step 2: Convert to fraction form
   21,841.50/30,140.19 = 12,409.86/x
3. Step 3: Cross multiply
   21,841.50x = 30,140.19 × 12,409.86
4. Step 4: Simplify right side
   21,841.50x = 374,035,538.27
5. Step 5: Solve for x
   x = 374,035,538.27/21,841.50
6. Step 6: Final answer
   x = 17,124.99