Finding the Fourth Proportional to 23,780.79, 32,819.72 and 13,172.49

Step by Step Solution

1. Step 1: Write the proportion equation
   23,780.79 : 32,819.72 = 13,172.49 : x
2. Step 2: Convert to fraction form
   23,780.79/32,819.72 = 13,172.49/x
3. Step 3: Cross multiply
   23,780.79x = 32,819.72 × 13,172.49
4. Step 4: Simplify right side
   23,780.79x = 432,317,367.64
5. Step 5: Solve for x
   x = 432,317,367.64/23,780.79
6. Step 6: Final answer
   x = 18,179.27