Finding the Fourth Proportional to 9,611.17, 13,263.42 and 5,419.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,611.17 : 13,263.42 = 5,419.42 : x
2. Step 2: Convert to fraction form
   9,611.17/13,263.42 = 5,419.42/x
3. Step 3: Cross multiply
   9,611.17x = 13,263.42 × 5,419.42
4. Step 4: Simplify right side
   9,611.17x = 71,880,043.62
5. Step 5: Solve for x
   x = 71,880,043.62/9,611.17
6. Step 6: Final answer
   x = 7,478.80