Finding the Fourth Proportional to 20,766.42, 28,648.98 and 13,598.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,766.42 : 28,648.98 = 13,598.10 : x
2. Step 2: Convert to fraction form
   20,766.42/28,648.98 = 13,598.10/x
3. Step 3: Cross multiply
   20,766.42x = 28,648.98 × 13,598.10
4. Step 4: Simplify right side
   20,766.42x = 389,571,694.94
5. Step 5: Solve for x
   x = 389,571,694.94/20,766.42
6. Step 6: Final answer
   x = 18,759.69