Finding the Fourth Proportional to 7,138.72, 9,851.01 and 3,951.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,138.72 : 9,851.01 = 3,951.82 : x
2. Step 2: Convert to fraction form
   7,138.72/9,851.01 = 3,951.82/x
3. Step 3: Cross multiply
   7,138.72x = 9,851.01 × 3,951.82
4. Step 4: Simplify right side
   7,138.72x = 38,929,418.34
5. Step 5: Solve for x
   x = 38,929,418.34/7,138.72
6. Step 6: Final answer
   x = 5,453.28