Finding the Fourth Proportional to 7,904.36, 11,857.89 and 3,521.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,904.36 : 11,857.89 = 3,521.72 : x
2. Step 2: Convert to fraction form
   7,904.36/11,857.89 = 3,521.72/x
3. Step 3: Cross multiply
   7,904.36x = 11,857.89 × 3,521.72
4. Step 4: Simplify right side
   7,904.36x = 41,760,168.37
5. Step 5: Solve for x
   x = 41,760,168.37/7,904.36
6. Step 6: Final answer
   x = 5,283.18