Finding the Fourth Proportional to 12,075.99, 16,624.55 and 10,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,075.99 : 16,624.55 = 10,390.56 : x
2. Step 2: Convert to fraction form
   12,075.99/16,624.55 = 10,390.56/x
3. Step 3: Cross multiply
   12,075.99x = 16,624.55 × 10,390.56
4. Step 4: Simplify right side
   12,075.99x = 172,738,410.22
5. Step 5: Solve for x
   x = 172,738,410.22/12,075.99
6. Step 6: Final answer
   x = 14,304.29