Finding the Fourth Proportional to 37,128.48, 55,695.12 and 10,831

Step by Step Solution

1. Step 1: Write the proportion equation
   37,128.48 : 55,695.12 = 10,831 : x
2. Step 2: Convert to fraction form
   37,128.48/55,695.12 = 10,831/x
3. Step 3: Cross multiply
   37,128.48x = 55,695.12 × 10,831
4. Step 4: Simplify right side
   37,128.48x = 603,233,844.72
5. Step 5: Solve for x
   x = 603,233,844.72/37,128.48
6. Step 6: Final answer
   x = 16,247.20