Finding the Fourth Proportional to 8,111.28, 12,168.54 and 2,917.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.28 : 12,168.54 = 2,917.56 : x
2. Step 2: Convert to fraction form
   8,111.28/12,168.54 = 2,917.56/x
3. Step 3: Cross multiply
   8,111.28x = 12,168.54 × 2,917.56
4. Step 4: Simplify right side
   8,111.28x = 35,502,445.56
5. Step 5: Solve for x
   x = 35,502,445.56/8,111.28
6. Step 6: Final answer
   x = 4,376.92