Finding the Fourth Proportional to 23,782.79, 32,820.17 and 13,172.42

Step by Step Solution

1. Step 1: Write the proportion equation
   23,782.79 : 32,820.17 = 13,172.42 : x
2. Step 2: Convert to fraction form
   23,782.79/32,820.17 = 13,172.42/x
3. Step 3: Cross multiply
   23,782.79x = 32,820.17 × 13,172.42
4. Step 4: Simplify right side
   23,782.79x = 432,321,178.69
5. Step 5: Solve for x
   x = 432,321,178.69/23,782.79
6. Step 6: Final answer
   x = 18,177.90