Finding the Fourth Proportional to 21,838.78, 30,106.98 and 18,468.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,838.78 : 30,106.98 = 18,468.04 : x
2. Step 2: Convert to fraction form
   21,838.78/30,106.98 = 18,468.04/x
3. Step 3: Cross multiply
   21,838.78x = 30,106.98 × 18,468.04
4. Step 4: Simplify right side
   21,838.78x = 556,016,910.92
5. Step 5: Solve for x
   x = 556,016,910.92/21,838.78
6. Step 6: Final answer
   x = 25,460.07