Finding the Fourth Proportional to 105,518.93, 158,286.59 and 30,640.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,518.93 : 158,286.59 = 30,640.31 : x
2. Step 2: Convert to fraction form
   105,518.93/158,286.59 = 30,640.31/x
3. Step 3: Cross multiply
   105,518.93x = 158,286.59 × 30,640.31
4. Step 4: Simplify right side
   105,518.93x = 4,849,949,241.81
5. Step 5: Solve for x
   x = 4,849,949,241.81/105,518.93
6. Step 6: Final answer
   x = 45,962.84