Finding the Fourth Proportional to 9,611.57, 13,263.98 and 5,419.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,611.57 : 13,263.98 = 5,419.82 : x
2. Step 2: Convert to fraction form
   9,611.57/13,263.98 = 5,419.82/x
3. Step 3: Cross multiply
   9,611.57x = 13,263.98 × 5,419.82
4. Step 4: Simplify right side
   9,611.57x = 71,888,390.14
5. Step 5: Solve for x
   x = 71,888,390.14/9,611.57
6. Step 6: Final answer
   x = 7,479.36