Finding the Fourth Proportional to 18,993.69, 28,498.88 and 10,106.92

Step by Step Solution

1. Step 1: Write the proportion equation
   18,993.69 : 28,498.88 = 10,106.92 : x
2. Step 2: Convert to fraction form
   18,993.69/28,498.88 = 10,106.92/x
3. Step 3: Cross multiply
   18,993.69x = 28,498.88 × 10,106.92
4. Step 4: Simplify right side
   18,993.69x = 288,035,900.25
5. Step 5: Solve for x
   x = 288,035,900.25/18,993.69
6. Step 6: Final answer
   x = 15,164.82