Finding the Fourth Proportional to 9,243.81, 12,761.16 and 5,709.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,243.81 : 12,761.16 = 5,709.07 : x
2. Step 2: Convert to fraction form
   9,243.81/12,761.16 = 5,709.07/x
3. Step 3: Cross multiply
   9,243.81x = 12,761.16 × 5,709.07
4. Step 4: Simplify right side
   9,243.81x = 72,854,355.72
5. Step 5: Solve for x
   x = 72,854,355.72/9,243.81
6. Step 6: Final answer
   x = 7,881.42