Finding the Fourth Proportional to 11,570.16, 17,291.76 and 8,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,570.16 : 17,291.76 = 8,456.72 : x
2. Step 2: Convert to fraction form
   11,570.16/17,291.76 = 8,456.72/x
3. Step 3: Cross multiply
   11,570.16x = 17,291.76 × 8,456.72
4. Step 4: Simplify right side
   11,570.16x = 146,231,572.63
5. Step 5: Solve for x
   x = 146,231,572.63/11,570.16
6. Step 6: Final answer
   x = 12,638.68