Finding the Fourth Proportional to 19,039.98, 28,566.72 and 8,509.03

Step by Step Solution

1. Step 1: Write the proportion equation
   19,039.98 : 28,566.72 = 8,509.03 : x
2. Step 2: Convert to fraction form
   19,039.98/28,566.72 = 8,509.03/x
3. Step 3: Cross multiply
   19,039.98x = 28,566.72 × 8,509.03
4. Step 4: Simplify right side
   19,039.98x = 243,075,077.48
5. Step 5: Solve for x
   x = 243,075,077.48/19,039.98
6. Step 6: Final answer
   x = 12,766.56