Finding the Fourth Proportional to 8,597.59, 12,900.83 and 3,665.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,597.59 : 12,900.83 = 3,665.90 : x
2. Step 2: Convert to fraction form
   8,597.59/12,900.83 = 3,665.90/x
3. Step 3: Cross multiply
   8,597.59x = 12,900.83 × 3,665.90
4. Step 4: Simplify right side
   8,597.59x = 47,293,182.75
5. Step 5: Solve for x
   x = 47,293,182.75/8,597.59
6. Step 6: Final answer
   x = 5,500.75