Finding the Fourth Proportional to 13,272.16, 19,908.18 and 3,912.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,272.16 : 19,908.18 = 3,912.38 : x
2. Step 2: Convert to fraction form
   13,272.16/19,908.18 = 3,912.38/x
3. Step 3: Cross multiply
   13,272.16x = 19,908.18 × 3,912.38
4. Step 4: Simplify right side
   13,272.16x = 77,888,365.27
5. Step 5: Solve for x
   x = 77,888,365.27/13,272.16
6. Step 6: Final answer
   x = 5,868.55