Finding the Fourth Proportional to 12,908, 19,362.72 and 3,674.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,908 : 19,362.72 = 3,674.72 : x
2. Step 2: Convert to fraction form
   12,908/19,362.72 = 3,674.72/x
3. Step 3: Cross multiply
   12,908x = 19,362.72 × 3,674.72
4. Step 4: Simplify right side
   12,908x = 71,152,574.44
5. Step 5: Solve for x
   x = 71,152,574.44/12,908
6. Step 6: Final answer
   x = 5,512.28