Finding the Fourth Proportional to 19,002.55, 28,509.59 and 13,466.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,002.55 : 28,509.59 = 13,466.60 : x
2. Step 2: Convert to fraction form
   19,002.55/28,509.59 = 13,466.60/x
3. Step 3: Cross multiply
   19,002.55x = 28,509.59 × 13,466.60
4. Step 4: Simplify right side
   19,002.55x = 383,927,244.69
5. Step 5: Solve for x
   x = 383,927,244.69/19,002.55
6. Step 6: Final answer
   x = 20,203.99