Finding the Fourth Proportional to 8,111.91, 12,153.29 and 4,204.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.91 : 12,153.29 = 4,204.47 : x
2. Step 2: Convert to fraction form
   8,111.91/12,153.29 = 4,204.47/x
3. Step 3: Cross multiply
   8,111.91x = 12,153.29 × 4,204.47
4. Step 4: Simplify right side
   8,111.91x = 51,098,122.18
5. Step 5: Solve for x
   x = 51,098,122.18/8,111.91
6. Step 6: Final answer
   x = 6,299.15