Finding the Fourth Proportional to 10,512.89, 15,748.20 and 5,231.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,512.89 : 15,748.20 = 5,231.96 : x
2. Step 2: Convert to fraction form
   10,512.89/15,748.20 = 5,231.96/x
3. Step 3: Cross multiply
   10,512.89x = 15,748.20 × 5,231.96
4. Step 4: Simplify right side
   10,512.89x = 82,393,873.73
5. Step 5: Solve for x
   x = 82,393,873.73/10,512.89
6. Step 6: Final answer
   x = 7,837.42