Finding the Fourth Proportional to 9,361.31, 12,918.62 and 5,169.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,361.31 : 12,918.62 = 5,169.56 : x
2. Step 2: Convert to fraction form
   9,361.31/12,918.62 = 5,169.56/x
3. Step 3: Cross multiply
   9,361.31x = 12,918.62 × 5,169.56
4. Step 4: Simplify right side
   9,361.31x = 66,783,626.43
5. Step 5: Solve for x
   x = 66,783,626.43/9,361.31
6. Step 6: Final answer
   x = 7,134.00