Finding the Fourth Proportional to 8,669.31, 11,963.75 and 5,085.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,669.31 : 11,963.75 = 5,085.06 : x
2. Step 2: Convert to fraction form
   8,669.31/11,963.75 = 5,085.06/x
3. Step 3: Cross multiply
   8,669.31x = 11,963.75 × 5,085.06
4. Step 4: Simplify right side
   8,669.31x = 60,836,361.15
5. Step 5: Solve for x
   x = 60,836,361.15/8,669.31
6. Step 6: Final answer
   x = 7,017.44