Finding the Fourth Proportional to 12,940.32, 17,857.55 and 7,351.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.32 : 17,857.55 = 7,351.32 : x
2. Step 2: Convert to fraction form
   12,940.32/17,857.55 = 7,351.32/x
3. Step 3: Cross multiply
   12,940.32x = 17,857.55 × 7,351.32
4. Step 4: Simplify right side
   12,940.32x = 131,276,527.71
5. Step 5: Solve for x
   x = 131,276,527.71/12,940.32
6. Step 6: Final answer
   x = 10,144.77