Finding the Fourth Proportional to 17,618.28, 26,560.77 and 16,665.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,618.28 : 26,560.77 = 16,665.72 : x
2. Step 2: Convert to fraction form
   17,618.28/26,560.77 = 16,665.72/x
3. Step 3: Cross multiply
   17,618.28x = 26,560.77 × 16,665.72
4. Step 4: Simplify right side
   17,618.28x = 442,654,355.80
5. Step 5: Solve for x
   x = 442,654,355.80/17,618.28
6. Step 6: Final answer
   x = 25,124.72