Finding the Fourth Proportional to 8,108.91, 12,156.05 and 2,913.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,108.91 : 12,156.05 = 2,913.57 : x
2. Step 2: Convert to fraction form
   8,108.91/12,156.05 = 2,913.57/x
3. Step 3: Cross multiply
   8,108.91x = 12,156.05 × 2,913.57
4. Step 4: Simplify right side
   8,108.91x = 35,417,488.03
5. Step 5: Solve for x
   x = 35,417,488.03/8,108.91
6. Step 6: Final answer
   x = 4,367.72