Finding the Fourth Proportional to 11,869.50, 16,380.18 and 7,685.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,869.50 : 16,380.18 = 7,685.04 : x
2. Step 2: Convert to fraction form
   11,869.50/16,380.18 = 7,685.04/x
3. Step 3: Cross multiply
   11,869.50x = 16,380.18 × 7,685.04
4. Step 4: Simplify right side
   11,869.50x = 125,882,338.51
5. Step 5: Solve for x
   x = 125,882,338.51/11,869.50
6. Step 6: Final answer
   x = 10,605.53