Finding the Fourth Proportional to 21,839.46, 30,107.94 and 18,468.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,839.46 : 30,107.94 = 18,468.72 : x
2. Step 2: Convert to fraction form
   21,839.46/30,107.94 = 18,468.72/x
3. Step 3: Cross multiply
   21,839.46x = 30,107.94 × 18,468.72
4. Step 4: Simplify right side
   21,839.46x = 556,055,113.64
5. Step 5: Solve for x
   x = 556,055,113.64/21,839.46
6. Step 6: Final answer
   x = 25,461.03