Finding the Fourth Proportional to 8,105.72, 12,145.10 and 2,837.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.72 : 12,145.10 = 2,837.90 : x
2. Step 2: Convert to fraction form
   8,105.72/12,145.10 = 2,837.90/x
3. Step 3: Cross multiply
   8,105.72x = 12,145.10 × 2,837.90
4. Step 4: Simplify right side
   8,105.72x = 34,466,579.29
5. Step 5: Solve for x
   x = 34,466,579.29/8,105.72
6. Step 6: Final answer
   x = 4,252.13