Finding the Fourth Proportional to 17,256.55, 23,764.73 and 15,540.43

Step by Step Solution

1. Step 1: Write the proportion equation
   17,256.55 : 23,764.73 = 15,540.43 : x
2. Step 2: Convert to fraction form
   17,256.55/23,764.73 = 15,540.43/x
3. Step 3: Cross multiply
   17,256.55x = 23,764.73 × 15,540.43
4. Step 4: Simplify right side
   17,256.55x = 369,314,123.03
5. Step 5: Solve for x
   x = 369,314,123.03/17,256.55
6. Step 6: Final answer
   x = 21,401.39