Finding the Fourth Proportional to 11,540.40, 15,920.80 and 7,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,540.40 : 15,920.80 = 7,062.72 : x
2. Step 2: Convert to fraction form
   11,540.40/15,920.80 = 7,062.72/x
3. Step 3: Cross multiply
   11,540.40x = 15,920.80 × 7,062.72
4. Step 4: Simplify right side
   11,540.40x = 112,444,152.58
5. Step 5: Solve for x
   x = 112,444,152.58/11,540.40
6. Step 6: Final answer
   x = 9,743.52