Finding the Fourth Proportional to 17,615.28, 26,556.24 and 16,662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,615.28 : 26,556.24 = 16,662.72 : x
2. Step 2: Convert to fraction form
   17,615.28/26,556.24 = 16,662.72/x
3. Step 3: Cross multiply
   17,615.28x = 26,556.24 × 16,662.72
4. Step 4: Simplify right side
   17,615.28x = 442,499,191.37
5. Step 5: Solve for x
   x = 442,499,191.37/17,615.28
6. Step 6: Final answer
   x = 25,120.19