Finding the Fourth Proportional to 13,665.58, 18,857.55 and 8,075.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.58 : 18,857.55 = 8,075.50 : x
2. Step 2: Convert to fraction form
   13,665.58/18,857.55 = 8,075.50/x
3. Step 3: Cross multiply
   13,665.58x = 18,857.55 × 8,075.50
4. Step 4: Simplify right side
   13,665.58x = 152,284,145.03
5. Step 5: Solve for x
   x = 152,284,145.03/13,665.58
6. Step 6: Final answer
   x = 11,143.63