Finding the Fourth Proportional to 21,608.08, 32,411.16 and 12,380.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,608.08 : 32,411.16 = 12,380.56 : x
2. Step 2: Convert to fraction form
   21,608.08/32,411.16 = 12,380.56/x
3. Step 3: Cross multiply
   21,608.08x = 32,411.16 × 12,380.56
4. Step 4: Simplify right side
   21,608.08x = 401,268,311.05
5. Step 5: Solve for x
   x = 401,268,311.05/21,608.08
6. Step 6: Final answer
   x = 18,570.29