Finding the Fourth Proportional to 12,378.80, 18,568.47 and 3,018.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,378.80 : 18,568.47 = 3,018.89 : x
2. Step 2: Convert to fraction form
   12,378.80/18,568.47 = 3,018.89/x
3. Step 3: Cross multiply
   12,378.80x = 18,568.47 × 3,018.89
4. Step 4: Simplify right side
   12,378.80x = 56,056,075.56
5. Step 5: Solve for x
   x = 56,056,075.56/12,378.80
6. Step 6: Final answer
   x = 4,528.39