Finding the Fourth Proportional to 105,963.68, 158,790 and 53,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,963.68 : 158,790 = 53,300.72 : x
2. Step 2: Convert to fraction form
   105,963.68/158,790 = 53,300.72/x
3. Step 3: Cross multiply
   105,963.68x = 158,790 × 53,300.72
4. Step 4: Simplify right side
   105,963.68x = 8,463,621,725.78
5. Step 5: Solve for x
   x = 8,463,621,725.78/105,963.68
6. Step 6: Final answer
   x = 79,872.85