Finding the Fourth Proportional to 8,105.16, 12,153.18 and 2,557.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.16 : 12,153.18 = 2,557.47 : x
2. Step 2: Convert to fraction form
   8,105.16/12,153.18 = 2,557.47/x
3. Step 3: Cross multiply
   8,105.16x = 12,153.18 × 2,557.47
4. Step 4: Simplify right side
   8,105.16x = 31,081,393.25
5. Step 5: Solve for x
   x = 31,081,393.25/8,105.16
6. Step 6: Final answer
   x = 3,834.77