Finding the Fourth Proportional to 10,072.87, 15,109.69 and 3,831.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.87 : 15,109.69 = 3,831.72 : x
2. Step 2: Convert to fraction form
   10,072.87/15,109.69 = 3,831.72/x
3. Step 3: Cross multiply
   10,072.87x = 15,109.69 × 3,831.72
4. Step 4: Simplify right side
   10,072.87x = 57,896,127.30
5. Step 5: Solve for x
   x = 57,896,127.30/10,072.87
6. Step 6: Final answer
   x = 5,747.73