Finding the Fourth Proportional to 12,112, 18,172.56 and 3,904

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112 : 18,172.56 = 3,904 : x
2. Step 2: Convert to fraction form
   12,112/18,172.56 = 3,904/x
3. Step 3: Cross multiply
   12,112x = 18,172.56 × 3,904
4. Step 4: Simplify right side
   12,112x = 70,945,674.24
5. Step 5: Solve for x
   x = 70,945,674.24/12,112
6. Step 6: Final answer
   x = 5,857.47