Finding the Fourth Proportional to 28,323.86, 42,489.86 and 10,553.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,323.86 : 42,489.86 = 10,553.04 : x
2. Step 2: Convert to fraction form
   28,323.86/42,489.86 = 10,553.04/x
3. Step 3: Cross multiply
   28,323.86x = 42,489.86 × 10,553.04
4. Step 4: Simplify right side
   28,323.86x = 448,397,139.41
5. Step 5: Solve for x
   x = 448,397,139.41/28,323.86
6. Step 6: Final answer
   x = 15,831.08