Finding the Fourth Proportional to 11,920.76, 17,880.83 and 5,685.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,920.76 : 17,880.83 = 5,685.18 : x
2. Step 2: Convert to fraction form
   11,920.76/17,880.83 = 5,685.18/x
3. Step 3: Cross multiply
   11,920.76x = 17,880.83 × 5,685.18
4. Step 4: Simplify right side
   11,920.76x = 101,655,737.10
5. Step 5: Solve for x
   x = 101,655,737.10/11,920.76
6. Step 6: Final answer
   x = 8,527.62