Finding the Fourth Proportional to 10,072.41, 13,901.58 and 8,391.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.41 : 13,901.58 = 8,391.15 : x
2. Step 2: Convert to fraction form
   10,072.41/13,901.58 = 8,391.15/x
3. Step 3: Cross multiply
   10,072.41x = 13,901.58 × 8,391.15
4. Step 4: Simplify right side
   10,072.41x = 116,650,243.02
5. Step 5: Solve for x
   x = 116,650,243.02/10,072.41
6. Step 6: Final answer
   x = 11,581.17