Finding the Fourth Proportional to 21,642.30, 32,478.04 and 8,493.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,642.30 : 32,478.04 = 8,493.12 : x
2. Step 2: Convert to fraction form
   21,642.30/32,478.04 = 8,493.12/x
3. Step 3: Cross multiply
   21,642.30x = 32,478.04 × 8,493.12
4. Step 4: Simplify right side
   21,642.30x = 275,839,929.81
5. Step 5: Solve for x
   x = 275,839,929.81/21,642.30
6. Step 6: Final answer
   x = 12,745.41