Finding the Fourth Proportional to 8,155.29, 12,238.42 and 2,890.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.29 : 12,238.42 = 2,890.28 : x
2. Step 2: Convert to fraction form
   8,155.29/12,238.42 = 2,890.28/x
3. Step 3: Cross multiply
   8,155.29x = 12,238.42 × 2,890.28
4. Step 4: Simplify right side
   8,155.29x = 35,372,483.93
5. Step 5: Solve for x
   x = 35,372,483.93/8,155.29
6. Step 6: Final answer
   x = 4,337.37