Finding the Fourth Proportional to 105,925.20, 158,628.60 and 50,456.40

Step by Step Solution

1. Step 1: Write the proportion equation
   105,925.20 : 158,628.60 = 50,456.40 : x
2. Step 2: Convert to fraction form
   105,925.20/158,628.60 = 50,456.40/x
3. Step 3: Cross multiply
   105,925.20x = 158,628.60 × 50,456.40
4. Step 4: Simplify right side
   105,925.20x = 8,003,828,093.04
5. Step 5: Solve for x
   x = 8,003,828,093.04/105,925.20
6. Step 6: Final answer
   x = 75,561.13