Finding the Fourth Proportional to 8,141.10, 10,999.13 and 8,141.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,141.10 : 10,999.13 = 8,141.10 : x
2. Step 2: Convert to fraction form
   8,141.10/10,999.13 = 8,141.10/x
3. Step 3: Cross multiply
   8,141.10x = 10,999.13 × 8,141.10
4. Step 4: Simplify right side
   8,141.10x = 89,544,976.54
5. Step 5: Solve for x
   x = 89,544,976.54/8,141.10
6. Step 6: Final answer
   x = 10,999.13