Finding the Fourth Proportional to 78,879.82, 118,320.06 and 19,715.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,879.82 : 118,320.06 = 19,715.57 : x
2. Step 2: Convert to fraction form
   78,879.82/118,320.06 = 19,715.57/x
3. Step 3: Cross multiply
   78,879.82x = 118,320.06 × 19,715.57
4. Step 4: Simplify right side
   78,879.82x = 2,332,747,425.33
5. Step 5: Solve for x
   x = 2,332,747,425.33/78,879.82
6. Step 6: Final answer
   x = 29,573.44