Finding the Fourth Proportional to 21,847.72, 30,149.86 and 12,416.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,847.72 : 30,149.86 = 12,416.04 : x
2. Step 2: Convert to fraction form
   21,847.72/30,149.86 = 12,416.04/x
3. Step 3: Cross multiply
   21,847.72x = 30,149.86 × 12,416.04
4. Step 4: Simplify right side
   21,847.72x = 374,341,867.75
5. Step 5: Solve for x
   x = 374,341,867.75/21,847.72
6. Step 6: Final answer
   x = 17,134.14