Finding the Fourth Proportional to 8,145.59, 12,218.18 and 2,599.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,145.59 : 12,218.18 = 2,599.28 : x
2. Step 2: Convert to fraction form
   8,145.59/12,218.18 = 2,599.28/x
3. Step 3: Cross multiply
   8,145.59x = 12,218.18 × 2,599.28
4. Step 4: Simplify right side
   8,145.59x = 31,758,396.82
5. Step 5: Solve for x
   x = 31,758,396.82/8,145.59
6. Step 6: Final answer
   x = 3,898.84