Finding the Fourth Proportional to 9,078.54, 13,611.88 and 3,816.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,078.54 : 13,611.88 = 3,816.91 : x
2. Step 2: Convert to fraction form
   9,078.54/13,611.88 = 3,816.91/x
3. Step 3: Cross multiply
   9,078.54x = 13,611.88 × 3,816.91
4. Step 4: Simplify right side
   9,078.54x = 51,955,320.89
5. Step 5: Solve for x
   x = 51,955,320.89/9,078.54
6. Step 6: Final answer
   x = 5,722.87