Finding the Fourth Proportional to 12,789.36, 19,170.72 and 5,862.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.36 : 19,170.72 = 5,862.24 : x
2. Step 2: Convert to fraction form
   12,789.36/19,170.72 = 5,862.24/x
3. Step 3: Cross multiply
   12,789.36x = 19,170.72 × 5,862.24
4. Step 4: Simplify right side
   12,789.36x = 112,383,361.61
5. Step 5: Solve for x
   x = 112,383,361.61/12,789.36
6. Step 6: Final answer
   x = 8,787.25