Finding the Fourth Proportional to 8,181.30, 12,273.31 and 2,919.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,181.30 : 12,273.31 = 2,919.34 : x
2. Step 2: Convert to fraction form
   8,181.30/12,273.31 = 2,919.34/x
3. Step 3: Cross multiply
   8,181.30x = 12,273.31 × 2,919.34
4. Step 4: Simplify right side
   8,181.30x = 35,829,964.82
5. Step 5: Solve for x
   x = 35,829,964.82/8,181.30
6. Step 6: Final answer
   x = 4,379.50