Finding the Fourth Proportional to 144,969.09, 217,516.22 and 78,456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   144,969.09 : 217,516.22 = 78,456.15 : x
2. Step 2: Convert to fraction form
   144,969.09/217,516.22 = 78,456.15/x
3. Step 3: Cross multiply
   144,969.09x = 217,516.22 × 78,456.15
4. Step 4: Simplify right side
   144,969.09x = 17,065,484,791.47
5. Step 5: Solve for x
   x = 17,065,484,791.47/144,969.09
6. Step 6: Final answer
   x = 117,718.09