Finding the Fourth Proportional to 105,520.93, 158,289.59 and 30,642.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,520.93 : 158,289.59 = 30,642.31 : x
2. Step 2: Convert to fraction form
   105,520.93/158,289.59 = 30,642.31/x
3. Step 3: Cross multiply
   105,520.93x = 158,289.59 × 30,642.31
4. Step 4: Simplify right side
   105,520.93x = 4,850,358,686.55
5. Step 5: Solve for x
   x = 4,850,358,686.55/105,520.93
6. Step 6: Final answer
   x = 45,965.84