Finding the Fourth Proportional to 28,315.30, 42,468 and 10,786.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,315.30 : 42,468 = 10,786.18 : x
2. Step 2: Convert to fraction form
   28,315.30/42,468 = 10,786.18/x
3. Step 3: Cross multiply
   28,315.30x = 42,468 × 10,786.18
4. Step 4: Simplify right side
   28,315.30x = 458,067,492.24
5. Step 5: Solve for x
   x = 458,067,492.24/28,315.30
6. Step 6: Final answer
   x = 16,177.38