Finding the Fourth Proportional to 105,813.78, 158,718.94 and 42,632.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,813.78 : 158,718.94 = 42,632.38 : x
2. Step 2: Convert to fraction form
   105,813.78/158,718.94 = 42,632.38/x
3. Step 3: Cross multiply
   105,813.78x = 158,718.94 × 42,632.38
4. Step 4: Simplify right side
   105,813.78x = 6,766,566,255.09
5. Step 5: Solve for x
   x = 6,766,566,255.09/105,813.78
6. Step 6: Final answer
   x = 63,947.88