Finding the Fourth Proportional to 21,822.90, 30,118.05 and 12,393.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,822.90 : 30,118.05 = 12,393.06 : x
2. Step 2: Convert to fraction form
   21,822.90/30,118.05 = 12,393.06/x
3. Step 3: Cross multiply
   21,822.90x = 30,118.05 × 12,393.06
4. Step 4: Simplify right side
   21,822.90x = 373,254,800.73
5. Step 5: Solve for x
   x = 373,254,800.73/21,822.90
6. Step 6: Final answer
   x = 17,103.81