Finding the Fourth Proportional to 8,155.46, 12,231.45 and 2,312.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.46 : 12,231.45 = 2,312.12 : x
2. Step 2: Convert to fraction form
   8,155.46/12,231.45 = 2,312.12/x
3. Step 3: Cross multiply
   8,155.46x = 12,231.45 × 2,312.12
4. Step 4: Simplify right side
   8,155.46x = 28,280,580.17
5. Step 5: Solve for x
   x = 28,280,580.17/8,155.46
6. Step 6: Final answer
   x = 3,467.69