Finding the Fourth Proportional to 28,185.32, 42,284.46 and 8,464.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,185.32 : 42,284.46 = 8,464.25 : x
2. Step 2: Convert to fraction form
   28,185.32/42,284.46 = 8,464.25/x
3. Step 3: Cross multiply
   28,185.32x = 42,284.46 × 8,464.25
4. Step 4: Simplify right side
   28,185.32x = 357,906,029.13
5. Step 5: Solve for x
   x = 357,906,029.13/28,185.32
6. Step 6: Final answer
   x = 12,698.32