Finding the Fourth Proportional to 105,471.20, 158,317.98 and 103,091.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,471.20 : 158,317.98 = 103,091.02 : x
2. Step 2: Convert to fraction form
   105,471.20/158,317.98 = 103,091.02/x
3. Step 3: Cross multiply
   105,471.20x = 158,317.98 × 103,091.02
4. Step 4: Simplify right side
   105,471.20x = 16,321,162,042.54
5. Step 5: Solve for x
   x = 16,321,162,042.54/105,471.20
6. Step 6: Final answer
   x = 154,745.20