Finding the Fourth Proportional to 21,380.27, 32,072.94 and 8,908.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,380.27 : 32,072.94 = 8,908.74 : x
2. Step 2: Convert to fraction form
   21,380.27/32,072.94 = 8,908.74/x
3. Step 3: Cross multiply
   21,380.27x = 32,072.94 × 8,908.74
4. Step 4: Simplify right side
   21,380.27x = 285,729,483.50
5. Step 5: Solve for x
   x = 285,729,483.50/21,380.27
6. Step 6: Final answer
   x = 13,364.17