Finding the Fourth Proportional to 105,939.54, 158,870.37 and 42,742.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105,939.54 : 158,870.37 = 42,742.77 : x
2. Step 2: Convert to fraction form
   105,939.54/158,870.37 = 42,742.77/x
3. Step 3: Cross multiply
   105,939.54x = 158,870.37 × 42,742.77
4. Step 4: Simplify right side
   105,939.54x = 6,790,559,684.72
5. Step 5: Solve for x
   x = 6,790,559,684.72/105,939.54
6. Step 6: Final answer
   x = 64,098.44