Finding the Fourth Proportional to 8,636.45, 12,949.81 and 5,662.13

Step by Step Solution

1. Step 1: Write the proportion equation
   8,636.45 : 12,949.81 = 5,662.13 : x
2. Step 2: Convert to fraction form
   8,636.45/12,949.81 = 5,662.13/x
3. Step 3: Cross multiply
   8,636.45x = 12,949.81 × 5,662.13
4. Step 4: Simplify right side
   8,636.45x = 73,323,428.79
5. Step 5: Solve for x
   x = 73,323,428.79/8,636.45
6. Step 6: Final answer
   x = 8,490.00