Finding the Fourth Proportional to 105,817.54, 158,724.56 and 42,636.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,817.54 : 158,724.56 = 42,636.12 : x
2. Step 2: Convert to fraction form
   105,817.54/158,724.56 = 42,636.12/x
3. Step 3: Cross multiply
   105,817.54x = 158,724.56 × 42,636.12
4. Step 4: Simplify right side
   105,817.54x = 6,767,399,493.70
5. Step 5: Solve for x
   x = 6,767,399,493.70/105,817.54
6. Step 6: Final answer
   x = 63,953.48