Finding the Fourth Proportional to 13,104, 19,656 and 3,870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,104 : 19,656 = 3,870.72 : x
2. Step 2: Convert to fraction form
   13,104/19,656 = 3,870.72/x
3. Step 3: Cross multiply
   13,104x = 19,656 × 3,870.72
4. Step 4: Simplify right side
   13,104x = 76,082,872.32
5. Step 5: Solve for x
   x = 76,082,872.32/13,104
6. Step 6: Final answer
   x = 5,806.08