Finding the Fourth Proportional to 105,945.54, 158,879.36 and 42,748.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,945.54 : 158,879.36 = 42,748.78 : x
2. Step 2: Convert to fraction form
   105,945.54/158,879.36 = 42,748.78/x
3. Step 3: Cross multiply
   105,945.54x = 158,879.36 × 42,748.78
4. Step 4: Simplify right side
   105,945.54x = 6,791,898,807.18
5. Step 5: Solve for x
   x = 6,791,898,807.18/105,945.54
6. Step 6: Final answer
   x = 64,107.45