Finding the Fourth Proportional to 9,511.88, 13,127.37 and 5,478.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,511.88 : 13,127.37 = 5,478.84 : x
2. Step 2: Convert to fraction form
   9,511.88/13,127.37 = 5,478.84/x
3. Step 3: Cross multiply
   9,511.88x = 13,127.37 × 5,478.84
4. Step 4: Simplify right side
   9,511.88x = 71,922,759.85
5. Step 5: Solve for x
   x = 71,922,759.85/9,511.88
6. Step 6: Final answer
   x = 7,561.37