Finding the Fourth Proportional to 21,624.57, 32,430.17 and 9,144.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,624.57 : 32,430.17 = 9,144.39 : x
2. Step 2: Convert to fraction form
   21,624.57/32,430.17 = 9,144.39/x
3. Step 3: Cross multiply
   21,624.57x = 32,430.17 × 9,144.39
4. Step 4: Simplify right side
   21,624.57x = 296,554,266.72
5. Step 5: Solve for x
   x = 296,554,266.72/21,624.57
6. Step 6: Final answer
   x = 13,713.76