Finding the Fourth Proportional to 144,969.73, 217,517.16 and 78,456.79

Step by Step Solution

1. Step 1: Write the proportion equation
   144,969.73 : 217,517.16 = 78,456.79 : x
2. Step 2: Convert to fraction form
   144,969.73/217,517.16 = 78,456.79/x
3. Step 3: Cross multiply
   144,969.73x = 217,517.16 × 78,456.79
4. Step 4: Simplify right side
   144,969.73x = 17,065,698,143.52
5. Step 5: Solve for x
   x = 17,065,698,143.52/144,969.73
6. Step 6: Final answer
   x = 117,719.04