Finding the Fourth Proportional to 15,752.37, 21,738.33 and 8,678.79

Step by Step Solution

1. Step 1: Write the proportion equation
   15,752.37 : 21,738.33 = 8,678.79 : x
2. Step 2: Convert to fraction form
   15,752.37/21,738.33 = 8,678.79/x
3. Step 3: Cross multiply
   15,752.37x = 21,738.33 × 8,678.79
4. Step 4: Simplify right side
   15,752.37x = 188,662,401.02
5. Step 5: Solve for x
   x = 188,662,401.02/15,752.37
6. Step 6: Final answer
   x = 11,976.76