Finding the Fourth Proportional to 9,611.09, 13,263.77 and 5,419.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,611.09 : 13,263.77 = 5,419.25 : x
2. Step 2: Convert to fraction form
   9,611.09/13,263.77 = 5,419.25/x
3. Step 3: Cross multiply
   9,611.09x = 13,263.77 × 5,419.25
4. Step 4: Simplify right side
   9,611.09x = 71,879,658.48
5. Step 5: Solve for x
   x = 71,879,658.48/9,611.09
6. Step 6: Final answer
   x = 7,478.82