Finding the Fourth Proportional to 131,091.10, 181,009.62 and 105,517

Step by Step Solution

1. Step 1: Write the proportion equation
   131,091.10 : 181,009.62 = 105,517 : x
2. Step 2: Convert to fraction form
   131,091.10/181,009.62 = 105,517/x
3. Step 3: Cross multiply
   131,091.10x = 181,009.62 × 105,517
4. Step 4: Simplify right side
   131,091.10x = 19,099,592,073.54
5. Step 5: Solve for x
   x = 19,099,592,073.54/131,091.10
6. Step 6: Final answer
   x = 145,697.09