Finding the Fourth Proportional to 10,479, 15,728.82 and 7,697.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,479 : 15,728.82 = 7,697.86 : x
2. Step 2: Convert to fraction form
   10,479/15,728.82 = 7,697.86/x
3. Step 3: Cross multiply
   10,479x = 15,728.82 × 7,697.86
4. Step 4: Simplify right side
   10,479x = 121,078,254.33
5. Step 5: Solve for x
   x = 121,078,254.33/10,479
6. Step 6: Final answer
   x = 11,554.37