Finding the Fourth Proportional to 21,648.42, 32,475.18 and 8,499.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,648.42 : 32,475.18 = 8,499.09 : x
2. Step 2: Convert to fraction form
   21,648.42/32,475.18 = 8,499.09/x
3. Step 3: Cross multiply
   21,648.42x = 32,475.18 × 8,499.09
4. Step 4: Simplify right side
   21,648.42x = 276,009,477.59
5. Step 5: Solve for x
   x = 276,009,477.59/21,648.42
6. Step 6: Final answer
   x = 12,749.64