Finding the Fourth Proportional to 8,942.57, 13,406.81 and 5,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,942.57 : 13,406.81 = 5,648.72 : x
2. Step 2: Convert to fraction form
   8,942.57/13,406.81 = 5,648.72/x
3. Step 3: Cross multiply
   8,942.57x = 13,406.81 × 5,648.72
4. Step 4: Simplify right side
   8,942.57x = 75,731,220.51
5. Step 5: Solve for x
   x = 75,731,220.51/8,942.57
6. Step 6: Final answer
   x = 8,468.62