Finding the Fourth Proportional to 105,546.42, 158,430.78 and 103,166.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,546.42 : 158,430.78 = 103,166.28 : x
2. Step 2: Convert to fraction form
   105,546.42/158,430.78 = 103,166.28/x
3. Step 3: Cross multiply
   105,546.42x = 158,430.78 × 103,166.28
4. Step 4: Simplify right side
   105,546.42x = 16,344,714,210.10
5. Step 5: Solve for x
   x = 16,344,714,210.10/105,546.42
6. Step 6: Final answer
   x = 154,858.06