Finding the Fourth Proportional to 145,054.27, 217,667.67 and 78,493.06

Step by Step Solution

1. Step 1: Write the proportion equation
   145,054.27 : 217,667.67 = 78,493.06 : x
2. Step 2: Convert to fraction form
   145,054.27/217,667.67 = 78,493.06/x
3. Step 3: Cross multiply
   145,054.27x = 217,667.67 × 78,493.06
4. Step 4: Simplify right side
   145,054.27x = 17,085,401,481.37
5. Step 5: Solve for x
   x = 17,085,401,481.37/145,054.27
6. Step 6: Final answer
   x = 117,786.27