Finding the Fourth Proportional to 8,411.50, 11,607.87 and 4,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.50 : 11,607.87 = 4,685.50 : x
2. Step 2: Convert to fraction form
   8,411.50/11,607.87 = 4,685.50/x
3. Step 3: Cross multiply
   8,411.50x = 11,607.87 × 4,685.50
4. Step 4: Simplify right side
   8,411.50x = 54,388,674.89
5. Step 5: Solve for x
   x = 54,388,674.89/8,411.50
6. Step 6: Final answer
   x = 6,465.99