Finding the Fourth Proportional to 10,072.28, 13,901.41 and 8,391.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.28 : 13,901.41 = 8,391.02 : x
2. Step 2: Convert to fraction form
   10,072.28/13,901.41 = 8,391.02/x
3. Step 3: Cross multiply
   10,072.28x = 13,901.41 × 8,391.02
4. Step 4: Simplify right side
   10,072.28x = 116,647,009.34
5. Step 5: Solve for x
   x = 116,647,009.34/10,072.28
6. Step 6: Final answer
   x = 11,580.99