Finding the Fourth Proportional to 10,933.48, 16,391.58 and 7,813.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,933.48 : 16,391.58 = 7,813.72 : x
2. Step 2: Convert to fraction form
   10,933.48/16,391.58 = 7,813.72/x
3. Step 3: Cross multiply
   10,933.48x = 16,391.58 × 7,813.72
4. Step 4: Simplify right side
   10,933.48x = 128,079,216.48
5. Step 5: Solve for x
   x = 128,079,216.48/10,933.48
6. Step 6: Final answer
   x = 11,714.41