Finding the Fourth Proportional to 12,823.76, 17,696.82 and 7,158.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,823.76 : 17,696.82 = 7,158.38 : x
2. Step 2: Convert to fraction form
   12,823.76/17,696.82 = 7,158.38/x
3. Step 3: Cross multiply
   12,823.76x = 17,696.82 × 7,158.38
4. Step 4: Simplify right side
   12,823.76x = 126,680,562.35
5. Step 5: Solve for x
   x = 126,680,562.35/12,823.76
6. Step 6: Final answer
   x = 9,878.58