Finding the Fourth Proportional to 21,645.42, 32,480.82 and 9,164.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,645.42 : 32,480.82 = 9,164.67 : x
2. Step 2: Convert to fraction form
   21,645.42/32,480.82 = 9,164.67/x
3. Step 3: Cross multiply
   21,645.42x = 32,480.82 × 9,164.67
4. Step 4: Simplify right side
   21,645.42x = 297,675,996.63
5. Step 5: Solve for x
   x = 297,675,996.63/21,645.42
6. Step 6: Final answer
   x = 13,752.38