Finding the Fourth Proportional to 11,215.31, 16,833.38 and 5,672.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,215.31 : 16,833.38 = 5,672.57 : x
2. Step 2: Convert to fraction form
   11,215.31/16,833.38 = 5,672.57/x
3. Step 3: Cross multiply
   11,215.31x = 16,833.38 × 5,672.57
4. Step 4: Simplify right side
   11,215.31x = 95,488,413.86
5. Step 5: Solve for x
   x = 95,488,413.86/11,215.31
6. Step 6: Final answer
   x = 8,514.12