Finding the Fourth Proportional to 13,143.25, 19,714.15 and 5,358.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,143.25 : 19,714.15 = 5,358.61 : x
2. Step 2: Convert to fraction form
   13,143.25/19,714.15 = 5,358.61/x
3. Step 3: Cross multiply
   13,143.25x = 19,714.15 × 5,358.61
4. Step 4: Simplify right side
   13,143.25x = 105,640,441.33
5. Step 5: Solve for x
   x = 105,640,441.33/13,143.25
6. Step 6: Final answer
   x = 8,037.62