Finding the Fourth Proportional to 28,358.28, 42,541.52 and 8,636.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,358.28 : 42,541.52 = 8,636.31 : x
2. Step 2: Convert to fraction form
   28,358.28/42,541.52 = 8,636.31/x
3. Step 3: Cross multiply
   28,358.28x = 42,541.52 × 8,636.31
4. Step 4: Simplify right side
   28,358.28x = 367,401,711.41
5. Step 5: Solve for x
   x = 367,401,711.41/28,358.28
6. Step 6: Final answer
   x = 12,955.71