Finding the Fourth Proportional to 78,618.61, 117,976.38 and 50,556.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,618.61 : 117,976.38 = 50,556.57 : x
2. Step 2: Convert to fraction form
   78,618.61/117,976.38 = 50,556.57/x
3. Step 3: Cross multiply
   78,618.61x = 117,976.38 × 50,556.57
4. Step 4: Simplify right side
   78,618.61x = 5,964,481,113.82
5. Step 5: Solve for x
   x = 5,964,481,113.82/78,618.61
6. Step 6: Final answer
   x = 75,866.02