Finding the Fourth Proportional to 12,477.72, 18,721.98 and 5,908.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.72 : 18,721.98 = 5,908.56 : x
2. Step 2: Convert to fraction form
   12,477.72/18,721.98 = 5,908.56/x
3. Step 3: Cross multiply
   12,477.72x = 18,721.98 × 5,908.56
4. Step 4: Simplify right side
   12,477.72x = 110,619,942.15
5. Step 5: Solve for x
   x = 110,619,942.15/12,477.72
6. Step 6: Final answer
   x = 8,865.40