Finding the Fourth Proportional to 11,291.34, 15,565.80 and 7,923.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,291.34 : 15,565.80 = 7,923.72 : x
2. Step 2: Convert to fraction form
   11,291.34/15,565.80 = 7,923.72/x
3. Step 3: Cross multiply
   11,291.34x = 15,565.80 × 7,923.72
4. Step 4: Simplify right side
   11,291.34x = 123,339,040.78
5. Step 5: Solve for x
   x = 123,339,040.78/11,291.34
6. Step 6: Final answer
   x = 10,923.33