Finding the Fourth Proportional to 145,795.49, 218,426.78 and 105,715.18

Step by Step Solution

1. Step 1: Write the proportion equation
   145,795.49 : 218,426.78 = 105,715.18 : x
2. Step 2: Convert to fraction form
   145,795.49/218,426.78 = 105,715.18/x
3. Step 3: Cross multiply
   145,795.49x = 218,426.78 × 105,715.18
4. Step 4: Simplify right side
   145,795.49x = 23,091,025,078.54
5. Step 5: Solve for x
   x = 23,091,025,078.54/145,795.49
6. Step 6: Final answer
   x = 158,379.55