Finding the Fourth Proportional to 10,147.50, 15,215.28 and 3,906.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.50 : 15,215.28 = 3,906.33 : x
2. Step 2: Convert to fraction form
   10,147.50/15,215.28 = 3,906.33/x
3. Step 3: Cross multiply
   10,147.50x = 15,215.28 × 3,906.33
4. Step 4: Simplify right side
   10,147.50x = 59,435,904.72
5. Step 5: Solve for x
   x = 59,435,904.72/10,147.50
6. Step 6: Final answer
   x = 5,857.20