Finding the Fourth Proportional to 12,869.82, 19,300.20 and 8,732.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,869.82 : 19,300.20 = 8,732.58 : x
2. Step 2: Convert to fraction form
   12,869.82/19,300.20 = 8,732.58/x
3. Step 3: Cross multiply
   12,869.82x = 19,300.20 × 8,732.58
4. Step 4: Simplify right side
   12,869.82x = 168,540,540.52
5. Step 5: Solve for x
   x = 168,540,540.52/12,869.82
6. Step 6: Final answer
   x = 13,095.80