Finding the Fourth Proportional to 21,739.50, 30,002.04 and 12,308.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,739.50 : 30,002.04 = 12,308.10 : x
2. Step 2: Convert to fraction form
   21,739.50/30,002.04 = 12,308.10/x
3. Step 3: Cross multiply
   21,739.50x = 30,002.04 × 12,308.10
4. Step 4: Simplify right side
   21,739.50x = 369,268,108.52
5. Step 5: Solve for x
   x = 369,268,108.52/21,739.50
6. Step 6: Final answer
   x = 16,986.04