Finding the Fourth Proportional to 18,933.71, 26,128.59 and 10,550.21

Step by Step Solution

1. Step 1: Write the proportion equation
   18,933.71 : 26,128.59 = 10,550.21 : x
2. Step 2: Convert to fraction form
   18,933.71/26,128.59 = 10,550.21/x
3. Step 3: Cross multiply
   18,933.71x = 26,128.59 × 10,550.21
4. Step 4: Simplify right side
   18,933.71x = 275,662,111.50
5. Step 5: Solve for x
   x = 275,662,111.50/18,933.71
6. Step 6: Final answer
   x = 14,559.33