Finding the Fourth Proportional to 21,825.55, 30,118.46 and 13,341.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,825.55 : 30,118.46 = 13,341.88 : x
2. Step 2: Convert to fraction form
   21,825.55/30,118.46 = 13,341.88/x
3. Step 3: Cross multiply
   21,825.55x = 30,118.46 × 13,341.88
4. Step 4: Simplify right side
   21,825.55x = 401,836,737.10
5. Step 5: Solve for x
   x = 401,836,737.10/21,825.55
6. Step 6: Final answer
   x = 18,411.30