Finding the Fourth Proportional to 105,836.94, 158,672.18 and 72,455.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,836.94 : 158,672.18 = 72,455.83 : x
2. Step 2: Convert to fraction form
   105,836.94/158,672.18 = 72,455.83/x
3. Step 3: Cross multiply
   105,836.94x = 158,672.18 × 72,455.83
4. Step 4: Simplify right side
   105,836.94x = 11,496,723,344.17
5. Step 5: Solve for x
   x = 11,496,723,344.17/105,836.94
6. Step 6: Final answer
   x = 108,626.75