Finding the Fourth Proportional to 22,321.98, 30,808.89 and 12,889.26

Step by Step Solution

1. Step 1: Write the proportion equation
   22,321.98 : 30,808.89 = 12,889.26 : x
2. Step 2: Convert to fraction form
   22,321.98/30,808.89 = 12,889.26/x
3. Step 3: Cross multiply
   22,321.98x = 30,808.89 × 12,889.26
4. Step 4: Simplify right side
   22,321.98x = 397,103,793.52
5. Step 5: Solve for x
   x = 397,103,793.52/22,321.98
6. Step 6: Final answer
   x = 17,789.81