Finding the Fourth Proportional to 21,822.89, 30,106.28 and 13,742.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,822.89 : 30,106.28 = 13,742.19 : x
2. Step 2: Convert to fraction form
   21,822.89/30,106.28 = 13,742.19/x
3. Step 3: Cross multiply
   21,822.89x = 30,106.28 × 13,742.19
4. Step 4: Simplify right side
   21,822.89x = 413,726,254.31
5. Step 5: Solve for x
   x = 413,726,254.31/21,822.89
6. Step 6: Final answer
   x = 18,958.37