Finding the Fourth Proportional to 9,879.81, 13,634.52 and 5,631.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.81 : 13,634.52 = 5,631.54 : x
2. Step 2: Convert to fraction form
   9,879.81/13,634.52 = 5,631.54/x
3. Step 3: Cross multiply
   9,879.81x = 13,634.52 × 5,631.54
4. Step 4: Simplify right side
   9,879.81x = 76,783,323.64
5. Step 5: Solve for x
   x = 76,783,323.64/9,879.81
6. Step 6: Final answer
   x = 7,771.74