Finding the Fourth Proportional to 12,957.72, 17,881.68 and 7,368.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.72 : 17,881.68 = 7,368.72 : x
2. Step 2: Convert to fraction form
   12,957.72/17,881.68 = 7,368.72/x
3. Step 3: Cross multiply
   12,957.72x = 17,881.68 × 7,368.72
4. Step 4: Simplify right side
   12,957.72x = 131,765,093.05
5. Step 5: Solve for x
   x = 131,765,093.05/12,957.72
6. Step 6: Final answer
   x = 10,168.85