Finding the Fourth Proportional to 13,145.83, 19,728.47 and 4,831

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.83 : 19,728.47 = 4,831 : x
2. Step 2: Convert to fraction form
   13,145.83/19,728.47 = 4,831/x
3. Step 3: Cross multiply
   13,145.83x = 19,728.47 × 4,831
4. Step 4: Simplify right side
   13,145.83x = 95,308,214.42
5. Step 5: Solve for x
   x = 95,308,214.42/13,145.83
6. Step 6: Final answer
   x = 7,250.07