Finding the Fourth Proportional to 8,290.06, 12,431.25 and 2,742.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,290.06 : 12,431.25 = 2,742.38 : x
2. Step 2: Convert to fraction form
   8,290.06/12,431.25 = 2,742.38/x
3. Step 3: Cross multiply
   8,290.06x = 12,431.25 × 2,742.38
4. Step 4: Simplify right side
   8,290.06x = 34,091,211.38
5. Step 5: Solve for x
   x = 34,091,211.38/8,290.06
6. Step 6: Final answer
   x = 4,112.30