Finding the Fourth Proportional to 17,856.72, 26,706.24 and 10,817.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,856.72 : 26,706.24 = 10,817.28 : x
2. Step 2: Convert to fraction form
   17,856.72/26,706.24 = 10,817.28/x
3. Step 3: Cross multiply
   17,856.72x = 26,706.24 × 10,817.28
4. Step 4: Simplify right side
   17,856.72x = 288,888,875.83
5. Step 5: Solve for x
   x = 288,888,875.83/17,856.72
6. Step 6: Final answer
   x = 16,178.16