Finding the Fourth Proportional to 10,942.72, 16,415.20 and 3,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,942.72 : 16,415.20 = 3,152.72 : x
2. Step 2: Convert to fraction form
   10,942.72/16,415.20 = 3,152.72/x
3. Step 3: Cross multiply
   10,942.72x = 16,415.20 × 3,152.72
4. Step 4: Simplify right side
   10,942.72x = 51,752,529.34
5. Step 5: Solve for x
   x = 51,752,529.34/10,942.72
6. Step 6: Final answer
   x = 4,729.40