Finding the Fourth Proportional to 17,228.72, 23,774.28 and 9,776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,228.72 : 23,774.28 = 9,776.72 : x
2. Step 2: Convert to fraction form
   17,228.72/23,774.28 = 9,776.72/x
3. Step 3: Cross multiply
   17,228.72x = 23,774.28 × 9,776.72
4. Step 4: Simplify right side
   17,228.72x = 232,434,478.76
5. Step 5: Solve for x
   x = 232,434,478.76/17,228.72
6. Step 6: Final answer
   x = 13,491.11