Finding the Fourth Proportional to 10,702.73, 14,783.88 and 8,215.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,702.73 : 14,783.88 = 8,215.57 : x
2. Step 2: Convert to fraction form
   10,702.73/14,783.88 = 8,215.57/x
3. Step 3: Cross multiply
   10,702.73x = 14,783.88 × 8,215.57
4. Step 4: Simplify right side
   10,702.73x = 121,458,001.01
5. Step 5: Solve for x
   x = 121,458,001.01/10,702.73
6. Step 6: Final answer
   x = 11,348.32