Finding the Fourth Proportional to 12,815.82, 17,681.90 and 7,506.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.82 : 17,681.90 = 7,506.88 : x
2. Step 2: Convert to fraction form
   12,815.82/17,681.90 = 7,506.88/x
3. Step 3: Cross multiply
   12,815.82x = 17,681.90 × 7,506.88
4. Step 4: Simplify right side
   12,815.82x = 132,735,819.73
5. Step 5: Solve for x
   x = 132,735,819.73/12,815.82
6. Step 6: Final answer
   x = 10,357.19