Finding the Fourth Proportional to 10,253.89, 15,375.37 and 5,311.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,253.89 : 15,375.37 = 5,311.27 : x
2. Step 2: Convert to fraction form
   10,253.89/15,375.37 = 5,311.27/x
3. Step 3: Cross multiply
   10,253.89x = 15,375.37 × 5,311.27
4. Step 4: Simplify right side
   10,253.89x = 81,662,714.86
5. Step 5: Solve for x
   x = 81,662,714.86/10,253.89
6. Step 6: Final answer
   x = 7,964.07