Finding the Fourth Proportional to 20,849.86, 31,271.52 and 7,699.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,849.86 : 31,271.52 = 7,699.15 : x
2. Step 2: Convert to fraction form
   20,849.86/31,271.52 = 7,699.15/x
3. Step 3: Cross multiply
   20,849.86x = 31,271.52 × 7,699.15
4. Step 4: Simplify right side
   20,849.86x = 240,764,147.86
5. Step 5: Solve for x
   x = 240,764,147.86/20,849.86
6. Step 6: Final answer
   x = 11,547.52