Finding the Fourth Proportional to 8,443.32, 12,666.42 and 2,599.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,443.32 : 12,666.42 = 2,599.80 : x
2. Step 2: Convert to fraction form
   8,443.32/12,666.42 = 2,599.80/x
3. Step 3: Cross multiply
   8,443.32x = 12,666.42 × 2,599.80
4. Step 4: Simplify right side
   8,443.32x = 32,930,158.72
5. Step 5: Solve for x
   x = 32,930,158.72/8,443.32
6. Step 6: Final answer
   x = 3,900.14