Finding the Fourth Proportional to 17,156.56, 25,726.62 and 8,381.20

Step by Step Solution

1. Step 1: Write the proportion equation
   17,156.56 : 25,726.62 = 8,381.20 : x
2. Step 2: Convert to fraction form
   17,156.56/25,726.62 = 8,381.20/x
3. Step 3: Cross multiply
   17,156.56x = 25,726.62 × 8,381.20
4. Step 4: Simplify right side
   17,156.56x = 215,619,947.54
5. Step 5: Solve for x
   x = 215,619,947.54/17,156.56
6. Step 6: Final answer
   x = 12,567.78