Finding the Fourth Proportional to 21,588.12, 32,355.45 and 8,427.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,588.12 : 32,355.45 = 8,427.24 : x
2. Step 2: Convert to fraction form
   21,588.12/32,355.45 = 8,427.24/x
3. Step 3: Cross multiply
   21,588.12x = 32,355.45 × 8,427.24
4. Step 4: Simplify right side
   21,588.12x = 272,667,142.46
5. Step 5: Solve for x
   x = 272,667,142.46/21,588.12
6. Step 6: Final answer
   x = 12,630.43