Finding the Fourth Proportional to 11,423.56, 17,116.38 and 7,256.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,423.56 : 17,116.38 = 7,256.20 : x
2. Step 2: Convert to fraction form
   11,423.56/17,116.38 = 7,256.20/x
3. Step 3: Cross multiply
   11,423.56x = 17,116.38 × 7,256.20
4. Step 4: Simplify right side
   11,423.56x = 124,199,876.56
5. Step 5: Solve for x
   x = 124,199,876.56/11,423.56
6. Step 6: Final answer
   x = 10,872.26