Finding the Fourth Proportional to 9,578.98, 13,217.01 and 5,599.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,578.98 : 13,217.01 = 5,599.31 : x
2. Step 2: Convert to fraction form
   9,578.98/13,217.01 = 5,599.31/x
3. Step 3: Cross multiply
   9,578.98x = 13,217.01 × 5,599.31
4. Step 4: Simplify right side
   9,578.98x = 74,006,136.26
5. Step 5: Solve for x
   x = 74,006,136.26/9,578.98
6. Step 6: Final answer
   x = 7,725.89